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CUET
-- Mathematics - Section B1
Definite Integration
$\int\limits_0^∞[2e^{-x}]dx$, where [.] denotes the greatest integer function, is equal to:
2 ln 4
ln 4
ln 2
None of these
$I=\int\limits_{0}^{ln\,2}1.dx+\int\limits_{ln\,2}^{∞}O.dx=ln\,2$
