underset(r=0)overset(n)(sum)(-1)^(r).^(n...

`underset(r=0)overset(n)(sum)(-1)^(r).^(n)C_(r)[(1)/(2^(r))+(3^(r))/(2^(2r))+(7^(r))/(2^(3r))+(15^(r))/(2^(4r))+ . . .m" terms"]=`

Verified by Experts

The correct Answer is:

`(2^(mn)-1)/((2^n-1)(2^(mn))`

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