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#1 2018-02-06 20:30:52

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,269

Please Check My Work Regarding Limit

The value of

is ....
a. 0
b.

c.

d. 2
e. 4
The approximation of x is supposed to be -2, actually, but for unknown reasons the negative sign can't show up in LaTeX.

What I did:







From then on is what got me hesitated. Does
equal 1? Because as far as I recall, this kind of things can only work if x approaches 0, can't it? However, if I keep treating
as 1, I got this:


Please tell me how to solve it properly.


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#2 2018-02-07 01:01:50

Alg Num Theory
Member
Registered: 2017-11-24
Posts: 338
Website

Re: Please Check My Work Regarding Limit

Monox D. I-Fly wrote:

The approximation of x is supposed to be -2, actually, but for unknown reasons the negative sign can't show up in LaTeX.

That’s because you put a backslash before the - sign.

\lim_{x\to\-2}

Don’t put any backslash: it’s just

\lim_{x\to-2}

On the other hand, do put a backslash before the cos – otherwise cos in italics looks like a product of three variables. When formatted properly, the expression should look like this:

PS: I looked through your working; I should think what you did was just fine.

Last edited by Alg Num Theory (2018-02-07 03:58:18)

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#3 2018-02-07 12:52:37

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,269

Re: Please Check My Work Regarding Limit

Alg Num Theory wrote:

PS: I looked through your working; I should think what you did was just fine.

So, the approximation of x doesn't have to be 0 to make it equals 1?


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#4 2018-02-07 20:01:15

zetafunc
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Registered: 2014-05-21
Posts: 2,210
Website

Re: Please Check My Work Regarding Limit

Monox D. I-Fly wrote:

So, the approximation of x doesn't have to be 0 to make it equals 1?

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#5 2018-02-08 15:29:33

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,269

Re: Please Check My Work Regarding Limit

Ah, so that's it! Thank you very much!


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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