Question

please answer my questions​

Answer 1

Step-by-step explanation:

I hope you help

Answer is 1

Answer 2

$\frac{1}{1 + a {}^{n - m} } + \frac{1}{1 + a {}^{m - n} } \\ = \frac{1}{1 + \frac{a {}^{n} }{a {}^{m} } } + \frac{1}{1 + \frac{a {}^{m} }{a {}^{n} } } \\ = \frac{1}{ \frac{a {}^{m} + a {}^{n} }{a {}^{m} } } + \frac{1}{ \frac{a {}^{n} + a {}^{m} }{a {}^{n} } } \\ = \frac{a {}^{m} }{a {}^{m} + a {}^{n} } + \frac{a {}^{n} }{a {}^{m} + a {}^{n} } \\ = \frac{a {}^{m} + a {}^{n} }{a {}^{m} + a {}^{n} } \\ = 1$