Derivatives

What is the slope of a horizontal tangent line?

Where is this function non differentiable?

Find the derivative of 8cos(x)+3tan(x)–5x

What is the definition of the derivative?

Find the point on the curve f(x) = x²+2x–15 at which the tangent line is horizontal.

The slope of the curve f(x)= 3x²–2x+1 at x= –2

If f(3) = 5 and f'(x) = –2, find an equation of the tangent line when x = 3.

List all conditions where the derivative does not exist:

Find the derivative of g(x) = x²cos(x) + tan(x) – 3x

Find the slope of the tangent line to f(x) = 6x–2x²+x³ at the point (–1, –11)