PLEASE HELP! f(x)=(1)/(x^(2) -3) , find: a.) f(3) and b.) f(2+h) Thanks for the help!

Question

PLEASE HELP!

f(x)=
`(1)/(x^(2) -3)` , find:

a.) f(3)
and
b.) f(2+h)

Thanks for the help!

Answer 1

You have to replace x with 3 and then with 2+h

Explanation:

`f(x)=(1)/(x^(2)-3) \\f(3)=(1)/(3^(2)-3) \\f(3)=(1)/(9-3) \\f(3)=(1)/(6) \\\\f(2-h)=(1)/((2-h)^(2)-3) \\f(2-h)=(1)/(2^(2)-4h+h^(2)-3) \\f(2-h)=(1)/(h^(2)+4h+1)`