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JEE Main 2013 Mathematics question

MathematicsContinuity and DifferentiabilityJEE Main 2013

Let f be a composite function of x defined by , . Then the number of points x where f is discontinuous is :

Answer: (2)

Solution

u(x) is discontinuous at x = 1. is discontinuous at u = 1 (x − 1

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Question ID VK-104154