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JEE Main Math Class 12 Continuity and Differentiability Part 1 Questions

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Question : 97

Total: 100

f is defined in [-5, 5] as
f (x) = x if x is rational
= – x if x is irrational. Then

f (x) is continuous at every x, except x = 0
f (x) is discontinuous at every x, except x = 0
f (x) is continuous everywhere
f (x) is discontinuous everywhere

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