Question

f y = x3 + 2x and dx, dt equals 5, find dy, dt when x = 2. Give only the numerical answer. For example, if dy, dt = 3, type only 3.

Numerical Answers Expected!

Answer 1

y = x^3 + 2 x
dy/dx = 3 x^2 + 2
dy/dt = dy/dx * dx/dt = (3 x^2+2)dx/dt
when dx/dt = 5 and x = 2 then
dy/dt = (3*4+2)5 = 14*5 = 140/2 = 70

Answer 2

thank u!!!!!!!!! :)

Answer 3

You are welcome.