( frac{1}{1+a^{(n-m)}}+ frac{1}{1+a^{(m-n)}}=? ) – McqOptions

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1.	( frac{1}{1+a^{(n-m)}}+ frac{1}{1+a^{(m-n)}}=? )
A.	1/2
B.	1
C.	a^(m+n)
Answer» D.

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