Question

How do you do this problem? I have attached the question as an image.

Answer 1

hello
you want to do some more rationalizing

Answer 2

before you begin...
if you want you can bring the sqrt(7) outside the limit

Answer 3

but you are still going to want to rationalize the remaining top

Answer 4

ok so far i got 7(a+h) -7a /[h(sqrt7(a+h)) + sqrt(7a)]

Answer 5

i'm not sure what to do next @myininaya

Answer 6

nevermind i got the answer. it's 7/[2sqrt(7a)]

Answer 7

\[\frac{7(a+h)-7(a)}{h(\sqrt{7(a+h)}+\sqrt{7a})} \text{ you were \right \to say on \top } 7a-7a=0 \\ \frac{7h}{h(\sqrt{7(a+h)}+\sqrt{7a})} \text{ then } h/h=1 \]
but anywho you said you got it
and great job :)

Answer 8

thanks