Find the critical points of the function. (Enter your answers as a comma-separated list.)

g(x) = square root(81 − x^2)

1 answer

y = (81-x^2)^.5

y' = .5(81-x^2)^-.5 (-2x)
= -x/sqrt(81-x^2)
what is denomination when x = -9
what is denominator when x=+9