Let the f : R → R be defined by f (x) = 2x + cosx, then f : ______.

Question

KollegeApply · Accepted Answer

Let the f : R $\to$ R be defined by f (x) = 2x + cosx, then f : is an increasing function. Explanation: Given that f(x) = 2x + cos x f'(x) = 2 – sin x Since f'(x) > 0 ∀ x So f(x) is an increasing function.

AChoose Your Answer