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Show that:$ \frac{1}{1+x^{a-b}}+\frac{1}{1+x^{b-a}}=1 $
To do:
We have to show that \( \frac{1}{1+x^{a-b}}+\frac{1}{1+x^{b-a}}=1 \).
Solution:
We know that,
$(a^{m})^{n}=a^{m n}$
$a^{m} \times a^{n}=a^{m+n}$
$a^{m} \div a^{n}=a^{m-n}$
$a^{0}=1$
Therefore,
LHS $=\frac{1}{1+x^{a-b}}+\frac{1}{1+x^{b-a}}$
$=\frac{1}{x^{b-b}+x^{a-b}}+\frac{1}{x^{a-a}+x^{b-a}}$
$=\frac{1}{x^{-b}(x^{b}+x^{a})}+\frac{1}{x^{-a}(x^{a}+x^{b})}$
$=\frac{x^{b}}{x^{a}+x^{b}}+\frac{x^{a}}{x^{a}+x^{b}}$
$=\frac{x^{b}+x^{a}}{x^{a}+x^{b}}$
$=\frac{x^{a}+x^{b}}{x^{a}+x^{b}}$
$=1$
$=$ RHS
Hence proved.
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