Question

prove that   1  upon  1 plus x raise a minus b  plus 1  upon  1  plus  x  raise b minus a is equal to  1.

Answer 1

$\frac{1}{(1+x)^{a-b}} \frac{1}{(1+x)^{b-a}}=(1+x)^{-(a-b)}(1+x)^{-(b-a)} \\ =(1+x)^{(b-a)}(1+x)^{-(b-a)}=1$

Answer 2

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