Question

lim [sqrt(x^2+12)-4]/(x-2)
x>2
Can someone show me how it's 1/2?

Answer 1

\[\lim_{x\rightarrow2}\frac{\sqrt{x^2+12}-4}{x-2}?\]

Answer 2

yes

Answer 3

brb phone.

Answer 4

Well.. while we wait for zz

Answer 5

Do you know L'hopital?

Answer 6

Yeah I do

Answer 7

That's makes things easy.

Answer 8

Yea, try it out

Answer 9

Try that. Might make it easier.

Answer 10

I'm not really experienced using it with square roots. I get sqrt2x/1

Answer 11

Do you know the derivative of a square root?

Answer 12

Nope