I'm not sure what I'm doing wrong. The answer I get is incorrect.
f(x) = -x^3
evaluate for f(a+h)-f(a) / h
f-(x^3)= -a^3-3a^3h-3ah^2-h^3
Then when I evaluate for f(a) I get:
f(a) = -a^3
After the -a^3 subtract each other out...I factor out an h from the numerator to cancel out an h from the denominator and get:
-3a^3 - 3ah-h^2
Probably a typo. The second term should be "-3a^2h", not "-3a^3h".
you continued your typo- this should be -3a^2- 3ah- h^2Then when I evaluate for f(a) I get:
f(a) = -a^3
After the -a^3 subtract each other out...I factor out an h from the numerator to cancel out an h from the denominator and get:
-3a^3 - 3ah-h^2