Continuity and DifferentiabilityHard

Question

The function f(x) = is not defined at x = 0. The value which should be assigned to f at x = 0, so that it is continuous at x = 0, is

Options

A.a - b
B.a + b
C.log a + log b
D.None of these

Solution

For f(x) to be continuous, we must have
    f(0) = f(x)


= a.1 + b.1      
= a + b     ∴     f(0) = (a + b)

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