Let a be a constant and let if x < 1 f(x) = { ax if...

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Let a be a constant and let if x < 1 f(x) = { ax if x >1 Then (a) f is continuous at 0 only if a = 0 (d) f'(0) exists only if a = 0 (b) f is differentiable at 1 for all a (c) f'(1) = 3 - a for all a (e) none of these Let a be a constant and let if x < 1 f(x) = { ax if x >1 Then (a) f is continuous at 0 only if a = 0 (d) f'(0) exists only if a = 0 (b) f is differentiable at 1 for all a (c) f'(1) = 3 - a for all a (e) none of these