If x-0-then the sum of the series e-x-e-2 x-e-3 x- isA- 1- B- 1-e-x-ex-1-11-e-xD- 1-1-ex

The correct option is D The given series is a GP with A=a^( x),r= e^ 2x/e^ x= e^ x ∴ S=a/1 r=e^ x/1+e^ x=1/1+e^x ...

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Sum of n Terms

If x>0,then t...

Question

If x>0,then the sum of the series $e^{- x} - e^{- 2 x} + e^{- 3 x} - . . . . . . . . . . . . . . \infty$ is

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