यदि underset( 0 )overset( infty )int [(...

यदि ` underset( 0 )overset( infty )int [( 3)/(e^(x))] dx =k ,` है, तो `e^(k) ` का मान है।

` 2`

` 3`

` (9)/(2) `

` 6`

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