GATE 2021 Aerospace Engineering: Differentiability & Continuity of f(x) = e^(-x)|cos x|

Aerospace Engineering > GATE 2021 > Calculus

Which of the following statement(s) is/are true about the function defined as
f(x) = e^-x|cos x| for x > 0?

Differentiable at x = π/2

Differentiable at x = π

Differentiable at x = 3π/2

Continuous at x = 2π

Correct : b,d

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