Question

find intervals where the function is increasing, function is decreasing and extrema. y=-0.33(x^2-1)

Answer 1

dy/dx = -0.66x
-0.66x = 0 ate turning point x = 0 , y = 0.33
maximum value at y = 0.33
increasing function interval = (-infinity, 0.33)
decreasing in (0.33, +infinity)

Answer 2

it has maximum value bescause second derivative is -0.66, a negative

Answer 3

thanks! but how did you do that differentiation!!! i can't even start it.