f(x) and g(x) are two functions differentiable in [0,1] such that f(0) = 2; g(0) = 0; f(1) = 6; and g(1) = 2. Then there must exist a constant c in ?
1
(0, 1), such that f’(c) = 2g’(c)
2
[0, 1], such that f’(c) = g’(c)
3
(0, 1), such that 2f’(c) = g’(c)
4
[0, 1], such that 2f’(c) = g’(c)