LimitsHard

Question

The number of points at which the function f(x) = max. {a - x, a + x, b}, - ∞ < x < ∞, 0 < a < b cannot be differentiable is:

Options

A.1
B.2
C.3
D.none of these

Solution

y = f(x) = max {a - x, a + x, b},      0 < a < b

f(x) is non-differentiable at 2 points

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