Mathematics

Problem

If function

y=f(x)

satisfies condition of Rolle's theorem in

[1, 3]

then the value of

\int_1^3 f'(x)\,dx

is equal to (a) 0 (b) 1 (c) 2 (d) 3 (a) 0 (b) 1 (c) 2 (d) 3