JEE Maths Zone - 2018-05-24

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Abcd

07:55

@Jasmine @samjoe According to me it should be 0 because denominator has higher power, what do you say?

3 hours later…

samjoe

10:58

@abcd i think limit is on $n$, and no highest power on both numerator and denominator is like $3/2$

2 hours later…

Anonymous

12:36

So it'll be 1

Abcd

@IceInkberry why

Anonymous

@Abcd Both the highest powers are $\dfrac{3}{2}$ and their coefficients are also the same that is $1$

Anonymous

Ignore everything execpt the terms with highest powers

Abcd

14:57

@IceInkberry how did you get their coefficients

samjoe

@Abcd just divide by $n^{3/2}$ on both numerator and denominator.

1 hour later…

Jasmine

16:10

@Abcd 1 should be the answer. Same logic as by @IceInkberry and @samjoe

Did anyone see they put x instead of n

Jasmine

16:37

@Abcd I just solved it and you may check in case you need solution.

Can anyone help me understanding some symbols I am very poor in getting symbols in functions. Is there any chart or any thing like that I really get scared when I see symbols

Parth Kohli

@Jasmine Which symbols are you talking about?

Jasmine

16:52

Too many symbols and norations

Parth Kohli

Do you have any examples of intimidating notation?

Jasmine

@ParthKohli nope actually whenever it's symbol I fail to understand.

@ParthKohli I have tried to learn a few lik f :x arrow y means x is the domain and y the codomain

Parth Kohli

Hm, they are very fundamental to functions. Koi standard textbook pakad le, and then try solving problems.

Jasmine

@ParthKohli I have solved problems without understanding symbols

Parth Kohli

I think you just answered your own question here. First build an understanding of the underlying notation.

Jasmine

16:58

@ParthKohli kisi bhi book me aise symbol ka kya matlab hota ha nahi dia hua hai

The books use the symbols themselves

Parth Kohli

Hmm

Sad

Then just use Google, maybe

Jasmine

Parth Kohli

Okay, which part of this is troublesome to you?

Jasmine

The 2nd sentence what does it mean?

Parth Kohli

The only point of this problem is to make you work through cumbersome notation. lol

The set of all x in the interval [-2,2] such that x <= 0 and f(|x|) = x

Jasmine

17:02

@ParthKohli perfect got itm

Parth Kohli

This means that we're looking at x in the interval [-2, 0] (since we have the condition x <= 0). Now in this interval, |x| = -x since x <= 0. So it wants to know for what x is f(x) = -x in [-2, 2].

Jasmine

Actually I have not learned set theory yet that's why

@ParthKohli I got it thanks! But there are more symbols to go

Parth Kohli

Shoot 'em.

Which class/grade/standard are you in?

Jasmine

I think I should first study set theory then it would get easier for me

Am in 12th

Just in 12

@ParthKohli I don't know why they didn't directly use[ -2,0] as interval

Parth Kohli