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sum(n=0)^( oo) (-1)^(n) x^( n+1)=...

`sum_(n=0)^( oo) (-1)^(n) x^( n+1)=`

A

`(x^n)/( 2(1+ x) )`

B

`(x)/( 1+x)`

C

`(x)/( x-1) `

D

`(x^n)/( x-1)`

Text Solution

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The correct Answer is:
B
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