Constant Raise to a Variable

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Exponential Function: $4^x + 6^x = 9^x$

Submitted by Infinitesimal on August 30, 2016 - 11:29am

Let $x$ be a real number that satisfy the equation

$4^x + 6^x = 9^x$

What is the value of $\left(\dfrac{2}{3}\right)^x$ ?

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