If f(x) is decreasing, then f'(x) is? f”(x) = negative If f(x) is a differentiable function and it is decreasing, then its derivative, f'(x), must be negative....
If f'(x) is increasing, then f”(x) is? y-f(a)=f'(a)(x-a) If f'(x) is increasing, then f”(x) is positive. To explain this, let’s first define what it means for a...