Please Check My Work Regarding Limit

Monox D. I-Fly · 2018-02-06 20:30:52

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.

Alg Num Theory · 2018-02-07 01:01:50

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:

[list=*]
[*]

[/*]
[/list]

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)

Monox D. I-Fly · 2018-02-07 12:52:37

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?

zetafunc · 2018-02-07 20:01:15

Monox D. I-Fly wrote:

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

Monox D. I-Fly · 2018-02-08 15:29:33

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

Math Is Fun Forum

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

Please Check My Work Regarding Limit

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

Re: Please Check My Work Regarding Limit

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

Re: Please Check My Work Regarding Limit

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

Re: Please Check My Work Regarding Limit

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

Re: Please Check My Work Regarding Limit

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