Compute the right-hand and left-hand derivatives as limits to show that the functions in Exercises 37–40 are not differentiable at the point P. 37. 38. y = f(x) /y = 2x y = x? y = f(x) y = 2 P(1, 2) у 3Dх х P(0, 0) 39. 40. y = f(x) y = f(x) P(1, 1) (у%3D 2х — 1 y = = P(1, 1) х y = Vx у3 х X. 2.

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