Question
$f(x)=\frac{9^{x}}{9^{x}+3}$, then prove that $f(x)+f(1-x)=1$.
Step 1
We need to find $f(1-x)$, which is obtained by replacing $x$ with $1-x$ in the function. So, $f(1-x)=\frac{9^{1-x}}{9^{1-x}+3}$. Show more…
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