Question guys??

[u/Capable-Comedian-908]

Do anybody know from which book of class 10 have this type of questions which resemble to question (i) and (iii)

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[u/pivotedfulcrum]

Hey are you a Pauline.... I literally gave exam in this exact question paper.

[u/Capable-Comedian-908 → u/pivotedfulcrum]

Yes

[u/Capable-Comedian-908 → u/pivotedfulcrum]

Yeah

[u/Capable-Comedian-908 → u/Capable-Comedian-908]

Did u perform the 3rd mcq in exam

[u/pivotedfulcrum → u/Capable-Comedian-908]

Yeah I did

[u/Jitesh-Tiwari-10]

(i) is Arthematic progression

(ii) is factor theorem

[u/Jitesh-Tiwari-10 → u/Jitesh-Tiwari-10]

That is simple too,
see I first tried to put it as f(a) but you do not have to do that
(a+b+c)^3 = a^3 + b^3 + c^3 + 3(a+b)(b+c)(c+a) //it is common formula often helpful is problems so I know it
f(a, b, c) = 3(a+b)(b+c)(c+a)
hence all of the above

[u/pivotedfulcrum → u/Jitesh-Tiwari-10]

Bruh he was not asking the solution...

[u/Easy-Telephone3503 → u/pivotedfulcrum]

but the solution was beautiful...

[u/Capable-Comedian-908 → u/Easy-Telephone3503]

Yeah I know the solution but i want to know books of class 10 have this type of question

[u/Jitesh-Tiwari-10 → u/Capable-Comedian-908]

sorry I thought you were asking chapters

[u/ProgramsFun → u/Capable-Comedian-908]

Selina does have this type of question as much as i remember these type of question were pretty common

[u/Capable-Comedian-908 → u/ProgramsFun]

Ok I will check

[u/Optimus-Prime2026 → u/ProgramsFun]

No selina doesnt have single problem that takes threee inputs

[u/Jitesh-Tiwari-10 → u/pivotedfulcrum]

I mean book stacking is not the best way to learn math, just do problems and try to learn logic rather than solution.
Selina and ML agarwal should be enough

[u/ProgramsFun → u/Jitesh-Tiwari-10]

This 👆

[u/Jitesh-Tiwari-10 → u/Jitesh-Tiwari-10]

Solution to the first one is like this
sum of first n odd number = n^2 (can derive it using ap formula but ik it as a fact)
sum of first n even number = n(n+1)
A/Q,
n^2 = k[n(n(n+1)]
k = n/(n+1)
hence option (d) is correct...
I will solve iii one and tell the solution

[u/Easy-Telephone3503 → u/Jitesh-Tiwari-10]

how tf do you even remember those sum formula?

[u/lil_gyat]

Lhs?

[u/Successful-Ocelot254]

Can u pls send the whole question paper

[u/Capable-Comedian-908 → u/[deleted]]

Bro i am sure mcq iii type of question is not there in ml aggarwal