Let f (x) be differentiable at x = x0, then limh → 0f (x0 + H) − f (x0) H () A. It is related to both x0 and h. B. It is only related to x0 but not to H. C. It is only related to h but not to x0. D. It is not related to both x0 and H

Let f (x) be differentiable at x = x0, then limh → 0f (x0 + H) − f (x0) H () A. It is related to both x0 and h. B. It is only related to x0 but not to H. C. It is only related to h but not to x0. D. It is not related to both x0 and H

∵ the function f (x) is differentiable at x = x0, ∵ we can get f ′ (x0) = limh → 0f (x0 + H) − f (x0) h, ∵ this limit is only related to x0 but not to h, so we choose B