Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,336

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.

Offline

**Alg Num Theory****Member**- Registered: 2017-11-24
- Posts: 339
- Website

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)*

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,336

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.

Offline

Monox D. I-Fly wrote:

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

**LearnMathsFree: Videos on various topics.New: Integration Problem | Adding FractionsPopular: Continued Fractions | Metric Spaces | Duality**

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,336

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.

Offline

Pages: **1**