Question

Help finding the second derivative.

Answer 1

write the numerator x^2-4 = x^2+4 -8
and then separate the denominator

Answer 2

that will simplify the derivative part

Answer 3

1-8/(x^2+4)

Answer 4

where did you get the 8?

Answer 5

@hartnn ?

Answer 6

x^2 -4 = (x^2+4) -8
just adjusted the numerator to get the form of denominator x^2+4

Answer 7

@hartnn I still don't understand how you got the -8, sorry :/

Answer 8

-4 = 4-8
right ?

Answer 9

yeah

Answer 10

x^2-4 = x^2+4-8
right ?

Answer 11

yes

Answer 12

so, x^2-4/ x^2+4 = x^2+4-8/ x^2+4 = x^2+4/ x^2+4 - 8/x^2+4 = 1-8/x^2+4

Answer 13

that's not any of the answer choices :/ @hartnn

Answer 14

because we have not yet taken any derivative! :P
you need to differentiate that twice