# Thread: evaluate the following limits

1. ## evaluate the following limits

7x^9-4x^5+2x-13/ -3x^9+x^8-5x+2x

lim-- infinity

and these

2x^2+1/6+x-3x^2

lim ---- infinity

2. ## Re: evaluate the following limits

Originally Posted by arsenal12345
7x^9-4x^5+2x-13/ -3x^9+x^8-5x+2x

lim-- infinity
Please confirm that the expression whose limit you need to find is exactly as written above.

3. ## Re: evaluate the following limits

Originally Posted by arsenal12345
7x^9-4x^5+2x-13/ -3x^9+x^8-5x+2x

lim-- infinity

and these

2x^2+1/6+x-3x^2

lim ---- infinity
Am I correct in assuming that these are \displaystyle \begin{align*} \lim_{x \to \infty}\frac{7x^9 - 4x^5 + 2x - 13}{-3x^2 + x^8 - 5x + 2x} \end{align*} and \displaystyle \begin{align*} \lim_{x \to \infty}\frac{2x^2 + 1}{6+x-3x^2} \end{align*}?

Next time please either learn some LaTeX or else at least use brackets where they're needed to make the expressions make sense.

4. ## Re: evaluate the following limits

Originally Posted by Prove It
Am I correct in assuming that these are \displaystyle \begin{align*} \lim_{x \to \infty}\frac{7x^9 - 4x^5 + 2x - 13}{-3x^2 + x^8 - 5x + 2x} \end{align*} and \displaystyle \begin{align*} \lim_{x \to \infty}\frac{2x^2 + 1}{6+x-3x^2} \end{align*}?

Next time please either learn some LaTeX or else at least use brackets where they're needed to make the expressions make sense.
Just to clarify, you mean \displaystyle \begin{align*} \lim_{x \to \infty}\frac{7x^9 - 4x^5 + 2x - 13}{-3x^9 + x^8 - 5x + 2x} \end{align*}

arsenal12345, divide both numerator and denominator by the highest power of x ( $x^9$ in the first problem, $x^2$ in the second).

5. ## Re: evaluate the following limits

Originally Posted by HallsofIvy
Just to clarify, you mean \displaystyle \begin{align*} \lim_{x \to \infty}\frac{7x^9 - 4x^5 + 2x - 13}{-3x^9 + x^8 - 5x + 2x} \end{align*}

arsenal12345, divide both numerator and denominator by the highest power of x ( $x^9$ in the first problem, $x^2$ in the second).
I don't see any difference...

6. ## Re: evaluate the following limits

Originally Posted by Prove It
Am I correct in assuming that these are \displaystyle \begin{align*} \lim_{x \to \infty}\frac{7x^9 - 4x^5 + 2x - 13}{-3x^2 + x^8 - 5x + 2x} \end{align*}
In the denominator, it should say $-3x^9$, not $-3x^2$.

7. ## Re: evaluate the following limits

Ah right, I think I must need glasses :P

*Awkwardly realises I'm already wearing glasses ><

8. ## Re: evaluate the following limits

yes u have assumed currecct man , i will try next time ,

so how do i solve them ?

9. ## Re: evaluate the following limits

Originally Posted by HallsofIvy
arsenal12345, divide both numerator and denominator by the highest power of x ( $x^9$ in the first problem, $x^2$ in the second).
.