Question

derivative of f(x)=(1/3) at x=(2/3)

Answer 1

Since function is equal to constant, derivative function is equal to zero, so for all x, especially at 2/3, the answer is zero.

Answer 2

Does this make sense?

Answer 3

kind of

Answer 4

We know that f(x) = 1/3

If we derivantive f(x), then f'(x) = 0

Derivative of constant is always equal to zero. (Yes, 1/3 is constant)

There is no x variable to plug in so no matter what x is, f'(x) is always zero.

Does this clear everything?