Question

f(x) = x/(5+x^2)
Determine all local extrema using the second derivative test.

Answer 1

well what's your second derivative?

Answer 2

i got -2x/ (5+x^2)

Answer 3

oh wait. it's -2x-1 / (5+x^2)

Answer 4

no its neither

Answer 5

is the denominator squared

Answer 6

first derivative i got (5-x)/ (5+x^2)^2