Use algebraic techniques to find:
Lim x- 4
(1/(sqrt(x) - 2) - (4/(x-4)

I keep getting zero as the answer, and apparently thats wrong. lol.

Question

Use algebraic techniques to find: 
Lim x-> 4
 (1/(sqrt(x) - 2) - (4/(x-4)

I keep getting zero as the answer, and apparently thats wrong. lol.

anonymous · Answer

$$\frac{ 1 }{ \sqrt{x}-2 }-\frac{ 4 }{ x-4 }$$

anonymous · Answer

whats the first part of the question... Lim x-> 4  are you saying you want to prove that the limit of x must be greater than 4?

anonymous · Answer

oh no, lol. I was just saying that the lim of x was approaching 4. I just put the "->" to make an arrow.

anonymous · Answer

lol right ok - so what are you trying to find/ prove then?  (or is there another side to the equation - ie what it equals?)

anonymous · Answer

Just trying to find what it equals to by using algebra.

anonymous · Answer

that kind of is what it equals. its a equation that will have different answers for different values of x. (which cant be 4 since at that point the equation is undefined.) if you have the other side of the equation then you can solve for x algebraically or if you have the value for x then you can solve the equation numerically.   

what was your working to get the answer of zero?

anonymous · Answer

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