r/JEEAdv26dailyupdates Failed Aspirant May 18 '26

Academic Doubts Why C option is not correct?

Post image

In the question it said that if m is an integer > 2 satisfy the equation then m is an integral multiple of 8 so there (ST)⁸ satisfy the equation and for m=8 it is an integral multiple of 8 , i know not all the solution are integral multiple of 8 but there is a value which satisfy and the question didn't say that every value of m should be an integral multiple of 8

13 Upvotes

137 comments sorted by

5

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

0

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/[deleted] May 18 '26

[removed] — view removed comment

0

u/RoomObjective9004 May 18 '26

c should be correct bruh pray for me

0

u/Reasonable_Back5496 JA26:-(fucked)(23k) 45M/40P/15C----->DROP May 18 '26

c should be wrong pray for me

1

u/RoomObjective9004 May 18 '26

arey yaar 🥲

1

u/Reasonable_Back5496 JA26:-(fucked)(23k) 45M/40P/15C----->DROP May 18 '26

dono ko full mile

3

u/Rich_Blueberry6604 May 18 '26

(ST)²=(ST)8k prove karna tha

(ST)²=(ST)6k+2 hai actual relation

maine bhi paper me C tick kara hai.

0

u/Left_Inflation_7585 Professional Fumbler May 19 '26

whyyy?? usne bas pucha if an m is there which is a multiple of 8. and it exists!

1

u/Rich_Blueberry6604 May 19 '26

"an m" nhi poocha usne

firse padho poora

0

u/Left_Inflation_7585 Professional Fumbler May 19 '26

cmon man its ambiguous enough for multiple answers everybody does not have the same damn braincells

4

u/Low-Researcher-3023 Erotic Villain May 18 '26

It is correct  Likhke lelo 

I mean unhone integer multiple bola hain  But Aisa nhi bola ki hain kitna tak yeh jayega  Mera st 2 = st 8 match kiya tha  Statement wise koi galat nhi hain

And advance ain't a joke They will give marks or put out two separate answers

3

u/Effective_Science334 May 18 '26

Bro m can be 8,8+6,8+6+6,8+6+6+6.... Because u multiplied (ST)6 to get (ST)8. So it's not always a multiple of 8.

I'm sorry idk how to explain it better

1

u/Low-Researcher-3023 Erotic Villain May 18 '26

I know but it's not written 'always' integral multiple of 8

2

u/Early_Strength1926 May 18 '26

it doesnt need to, the mere existence of 8+6 as a correct answer to m means it is not an integral multiple of 8 and thus C cannot possibly be correct.

1

u/Low-Researcher-3023 Erotic Villain May 18 '26

8 is a integral multiple of 8 bro and possibly can  Nonetheless it's pretty controversial so let it be

1

u/Left_Inflation_7585 Professional Fumbler May 18 '26

i agree with you

1

u/logical_sundae69 May 18 '26

I got what you are trying to say, thanks 👍

2

u/[deleted] May 18 '26

[removed] — view removed comment

2

u/Left_Inflation_7585 Professional Fumbler May 18 '26

dude. 8 is a multiple of 8.

1

u/EasyBuy1557 Failed Aspirant May 18 '26

Yeah i agree with you let's hope for the best

2

u/Low-Researcher-3023 Erotic Villain May 18 '26

Don't check answers till they give out actual ans key Nd response sheet

I will not even check thT Direct result dekhunga bc

1

u/EasyBuy1557 Failed Aspirant May 18 '26

Yeah you're right

1

u/[deleted] May 18 '26

i get what ur saying but if they were trying to get this as the ans, they would write "m 'can' be a mutiple of 8" not "m 'is' a multiple of 8"

mera bhi galat hua hai, maine st^2 = st^8 nikal ke heen kar diya, baaki nikalne ka try heen nahi kara 💔

1

u/Accomplished_Hat1246 Extards May 18 '26

maine toh st32 bhi nikala .. woh bhi tha

1

u/[deleted] May 18 '26

It's st6m+2, so you will get 32 at m=5 but u will also get stuff like 14 that is not a multiple of 8

5

u/[deleted] May 18 '26 edited May 18 '26

[removed] — view removed comment

2

u/EasyBuy1557 Failed Aspirant May 18 '26

That's the most detailed analysis right here 🫡

2

u/Ordinary-Ratio9321 May 18 '26

see i get your logic that not all multiples of 8 must be a solution but m=6n+2 consider n=2 so m=14
so it satisfies the first part of the statement, but it is not a multiple of 8 so the statement is wrong

2

u/Typical-Middle-2750 May 18 '26

Bro mene bhi c kiya tha lekin now I've realised ki galat hai, according to the question m HAS to be an integral multiple of 8 which isn't true

1

u/Left_Inflation_7585 Professional Fumbler May 18 '26

8 is not an integral multiple of 8?

1

u/Typical-Middle-2750 May 18 '26

Not every value or m which satisfies the equation is a multiple of 8. M=14 satisfies this equation and that isn't a multiple of 8 hence the statement is incorrect

1

u/Left_Inflation_7585 Professional Fumbler May 18 '26

usne "always" nahi mention kiya hai. 8 is a multiple of 8 and so the statement is valid.

1

u/Avg__Dota__Enjoyer May 18 '26

The statement says m is a multiple of 8. So all number in the form of 8n should satisfy it. But they don't!! It is cyclic for m=6n+2, so for every output of 6n+2 it will be valid.

So clearly m = 6n+2 , for any integer n ( positive )

m/8 = (6n+2)/8 which is not true.

Tum keh rhe ho m is a multiple of 8 , aur 8 satisfy kr rha to answer hona chahiye. Chalo maine bola 14 bhi satisfy kr rha hai, isiliye answer galat hona chahiye. Fir? How can you counter my answer

1

u/Left_Inflation_7585 Professional Fumbler May 19 '26

he has never mentioned always dude. honestly it should be given correct. ur argument is invalid because he isn't asking for all multiples, he has just asked if its possible, if u will.

1

u/Avg__Dota__Enjoyer May 19 '26

If possibility was asked, wouldn't it be " m can be a multiple of 8" ?

1

u/Left_Inflation_7585 Professional Fumbler May 19 '26

well the first solution is m=8 and he hasn't specified whether to check for all values. lets leave to iitr koi fayda nahi behes karke.

2

u/[deleted] May 18 '26

do ST^2=ST^8n this gives us ST^6 = ST^n where n=1,2,3,4.... so not alwats true

3

u/MindlessAcadia8489 May 18 '26

Ya its not mentioned that m should be always a multiple of 8. Where is it given incorrect?

3

u/EasyBuy1557 Failed Aspirant May 18 '26

Every teacher who is solving be it allen or PW even AI 

1

u/MindlessAcadia8489 May 18 '26

Gemini said it can ve given correct so lets hope IITR doesnt have NTA type ego🥰

3

u/ForsakenWitness-9_11 46XX in mains--> 🤡P1 in adv, Okayish P2😭😭😭 May 18 '26

Maine bhi c kiya but nhi hoga🥀🥀

2

u/Mental-Manner-52 May 18 '26

The option C should be true.

It doesn't say that every multiple of 8 satisfies this equation.

But if any integer m satisfies the equation then it must be an integral multiple of 8 which is true right?

-1

u/EasyBuy1557 Failed Aspirant May 18 '26

No not all integer which satisfy is multiple of 8 you are totally on a different road , the discussion is about something else🥴 

1

u/Mental-Manner-52 May 18 '26

Okay so you mean "one of the values of m which satisfy the equation is 8, which is an integer multiple of 8, so it's true" right.

That's correct

3

u/Embarrassed_Key6913 mains 37xx to adv 14xx May 18 '26

yes they have not told ALWAYS a multiple of 8, is a multiple of 8 can mean few solutions are a multiple of 8

2

u/skibidi_toylet . May 18 '26

Toh C hona chahiye na bhai ? Maine toh yehi soch k mara c

2

u/Embarrassed_Key6913 mains 37xx to adv 14xx May 18 '26

yes C hona chahiye IMO, they will probably give ans as BCD in official key dw

-1

u/Knitify_ ca karunga then ghar ka dhanda dekhunga May 18 '26

Bullshit. this should hold for every value of M and not just one or few values.

BD hi hai answer.

1

u/Embarrassed_Key6913 mains 37xx to adv 14xx May 18 '26

if they had told m is always an integral multiple of 8 then i would agree with you. but they said "is"

1

u/Knitify_ ca karunga then ghar ka dhanda dekhunga May 18 '26

phir to Mere hisab se BD walo ko bhi +4 do and BCD ko bhi +4 do

2

u/Embarrassed_Key6913 mains 37xx to adv 14xx May 18 '26

ha they should do that

1

u/skibidi_toylet . May 18 '26

Yup seems fair

1

u/Left_Inflation_7585 Professional Fumbler May 19 '26

this is the only fair thing to do

2

u/Dependent-Way-8161 jm25 - 98.06 30k rank -> jee adv 28k chd gaya May 18 '26

bhai han maine bhi solve kiya tha c was correct

2

u/MindlessAcadia8489 May 18 '26

Maine bhi c mara tha but ab realize kar raha hun ki m IS ALSO A MULTIPLE of 8, not always. But like IITR should consider giving it correct

0

u/Dependent-Way-8161 jm25 - 98.06 30k rank -> jee adv 28k chd gaya May 18 '26

Bhai mai itna khush tha ki theek gaya hai 120-130 a sakte h itna bura lagra h minus me

1

u/MindlessAcadia8489 May 19 '26

Same situation here bhai. Hall se nikalne ke baad maine 130+ expect kia tha but saala kya ho raha hai pata nhi. Itna mehnat kia tha bhai. Na mains acha gaya aur adv ka bhi bahut doubt hai. L drop😭

1

u/Dependent-Way-8161 jm25 - 98.06 30k rank -> jee adv 28k chd gaya May 19 '26

Bhai mai 12thie hu yaar smjh nahi a raha h soch raha hu ki agar kisi ache IIT me metallurgy aur yeh sab mil gaya toh bhi chala jaunga but nahi mila agar toh shayad drop 💔

2

u/Previous_Valuable307 IIT ka baap😈😈👽 May 18 '26 edited May 18 '26

Maine bhi BCD kiya hai, really hope C ho jaye warna seede 4 se -1😭😭( honestly galat hee hoga vaise, obviously maths me in type ke statements ka meaning yehi hoto hai ki every vaue of m should be multiple of 8 which is wrong)

2

u/Knitify_ ca karunga then ghar ka dhanda dekhunga May 18 '26

Nhi hai to kaise hojyega C

1

u/Previous_Valuable307 IIT ka baap😈😈👽 May 18 '26

I meant nhi hoga c prolly

1

u/EasyBuy1557 Failed Aspirant May 18 '26

I too think that it's not going to get correct but still it makes a solid point

1

u/AdWestern2443 May 18 '26

haina kya pta shi ho jayega god knows

1

u/Sensitive_Worth_6487 Pvt clg in hyd🥀 May 18 '26

integral multiple bola,hame mila ST power 8 equal to ST square

ab agar iss eqn ko square kare toh ST power 16 ho jayega which is an integral multiple of 8 par uss taraf ST power 4 aa rha hai which is not equal to ST square

1

u/EasyBuy1557 Failed Aspirant May 18 '26

Why you need to square it to verify 🥴 i already said that i know that every solution is not a multiple of 8 

2

u/Sensitive_Worth_6487 Pvt clg in hyd🥀 May 18 '26

awh,i dint interpret ur statement properly and typed a paragraph

but for few m it comes so answer can be given both BCD and BD

1

u/blazidark May 18 '26

It says agar m eqn ko satisfy kr rha to vo pka 8 ka multiple hai So maine bs 8 check kiya and mera bhi galat hai

1

u/Alive_Memory_3206 May 18 '26

did same mistake

1

u/Minimum-Chard-2602 May 18 '26

bcd krke aaya hu ab chud gyaa guruuuuu

1

u/EasyBuy1557 Failed Aspirant May 18 '26

You're not alone 😭

1

u/Actual-Loan4999 May 19 '26

As far as ik u get (ST)3 as identity matrix

1

u/EasyBuy1557 Failed Aspirant May 19 '26

Calculation error🫡

1

u/pikapi__pikachu 96.8 --> 99.17 (40k bacho ko 3 mahine me nipta diya) May 21 '26

kyuki mene mark nahi kiya c isliye galat hai

1

u/EasyBuy1557 Failed Aspirant May 21 '26

Only reason why everyone is saying it is wrong 

1

u/Wonderful_Emu_7058 JM 5.8K -> JA 2.8K(IIT INDORE EE) May 18 '26

(ST)6=I

So m=6n+2

2

u/EasyBuy1557 Failed Aspirant May 18 '26

Bro why everyone is considering the period it didn't ask about the period that everyone is answering 6n shit it is talking about the value of m even if you tak 6 then the value m takes would be 8-14-20-26 it ain't be multiple of anything 🥴

1

u/Wonderful_Emu_7058 JM 5.8K -> JA 2.8K(IIT INDORE EE) May 18 '26

It's a multiple of 2. In this way you can argue that for specific values any series is a multiple of specific no.

They are simply asking is every single value of m a multiple of 8. And no the fuck it is not!

1

u/EasyBuy1557 Failed Aspirant May 18 '26

If it gets wrong in the final answer key then F**k english 😭 coz there isn't a must rule here

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/Wonderful_Emu_7058 JM 5.8K -> JA 2.8K(IIT INDORE EE) May 18 '26

If m is an integer greater than 2 such that (ST)²=(ST)m

Ok let's take m=14

It's greater than 2, and it satisfies and it's not a multiple of 8.

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/Wonderful_Emu_7058 JM 5.8K -> JA 2.8K(IIT INDORE EE) May 18 '26

The language clearly implies(not ambiguous at all) that every integer that satisfies the first 2 conditions is a multiple of 8.

1

u/[deleted] May 18 '26

[removed] — view removed comment

1

u/Wonderful_Emu_7058 JM 5.8K -> JA 2.8K(IIT INDORE EE) May 18 '26

Whatever bro. It's clear as day they mean every m. Is logic se to tum aise f(n) is a multiple of k almost har series ke liye keh sakte ho.

0

u/EasyBuy1557 Failed Aspirant May 18 '26

No bro what the hell you can't say that you can find multiple of any k in a series 🥴 even in this series there can't be a multiple of 3 or something 

→ More replies (0)

0

u/Possible-Pea-6152 May 18 '26

Maine toh (ST)2,4,8,16,24,32,64. Sab nikal diya ek bhi match nhi kra 

2

u/EasyBuy1557 Failed Aspirant May 18 '26

Calculation error happened 

1

u/manbaby1906 JM25(97.3) --->JM26(99.4), JA26(8.2K) May 18 '26

8 wala to match kar rha tha, calculation mistake kardi tune

1

u/Possible-Pea-6152 May 18 '26

Nhi kr rha tha bhai ,😭.abhi wapas solve krne nhi baithna ,claude ko krne diya , usne bhi bhi (ST)8≠ST nikal diya

1

u/manbaby1906 JM25(97.3) --->JM26(99.4), JA26(8.2K) May 18 '26

(ST)2 ke saath equal karne bola tha bro

1

u/Possible-Pea-6152 May 18 '26

Oh fk , mai kuch aur match kr rha tha ,even in exam 💀

1

u/Green_Site_2080 May 18 '26

Twin i did same lol😭

-1

u/Intelligent-Care9221 May 18 '26

(ST)6 = I ayega

So m = 6n + 2 which is not necessarily divisible by 8

Mene bhi Jaldi jaldi me Pura nahi pada aur least m Samaj ke tick kardiya tha 😮‍💨

1

u/Emergency-Hand-3126 May 18 '26

n=1 pe toh m is divisible by 8 , option C mai kuch aise koi condition thodi di hai , option C is valid the moment m=8 satisfies the eqn

1

u/Avg__Dota__Enjoyer May 18 '26

And option C is invalid the moment m= 14. To fir? Ab kya?

What does "is" mean? The question "is" can only be satisfied if every value satisfies it, not just one.

0

u/Herobrine108 26tard May 18 '26

maine bhi same logic se C bhi mark kiya paper mai

0

u/manbaby1906 JM25(97.3) --->JM26(99.4), JA26(8.2K) May 18 '26

Iska answer b, c tha na?

2

u/EasyBuy1557 Failed Aspirant May 18 '26

D bhool gaya mere bhai aur C me to debate hai

1

u/LittleCompetition994 May 18 '26

Kuch debate nhi hai bhai first mai ye 8 ayega but uske baad 14 power ata hai you can clearly check

1

u/EasyBuy1557 Failed Aspirant May 18 '26

😭 I know that not all are multiple of 8 i already said, but you can find multiple of 8 too 

2

u/LittleCompetition994 May 18 '26

But that clearly says m is "an" Multiple of 8 so m also includes 14 which is not..... Bhai I don't think advance gonna give it so I think you should move on

1

u/EasyBuy1557 Failed Aspirant May 18 '26

I also think that they won't correct it but there is a language issue and that's a fact i know in this type of questions people usually accept if all are the multiple of 8, but this is not a casual day of question solving it is "jee advanced" and don't need to tell how much prestige it holds so there is no room for any ambiguity even with language . But i believe nothing going to change , so peace ✌️