need help

Hi Mathematicianoftheworld,

Like Chris said - what you have done is interlectual theft.

And, it is not a good look.

So

DON'T DO IT AGAIN. 

Now that I have taken care of that bit of business - Welcome to the web2 forum.

Notice that the top will factor as  [4 - √a] [4 + √a]

So we have

lim as  a → 16     [4 - √a] [4 + √a] / [4 - √a]  =

lim as  a → 16     [4 + √a]  =

4 + √16  =  4 + 4   = 8

Notice that the top will factor as  [4 - √a] [4 + √a]

So we have

lim as  a → 16     [4 - √a] [4 + √a] / [4 - √a]  =

lim as  a → 16     [4 + √a]  =

4 + √16  =  4 + 4   = 8

C'mon, themathematicianoftheworld....if you're going to "steal" answers....at least try to make it LOOK like you have something original to add......