If $$A = 1 + 2^p$$ and $$B = 1 + 2^{-p}$$,then what is the value of $$B$$?
$$\ B=1+2^{-p}\ .$$
or, $$\ B=1+\frac{1}{2^P}.\ \left(given\ A\ =1+2^P\right)$$
or, $$\ B=1+\frac{1}{A-1}.\ $$
or, $$\ B=\frac{A-1+1}{A-1}=\frac{A}{A-1}\ .$$
C is correct choice.
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