I want to simplify an equation in terms of $x$. And I tried the Simplify
and Collect
functions by assuming $x$ is positive real. But the result does not collect the $x$ together.
a = x^4;
b = (y/x^(3/8))^(7/9);
Assuming[{x > 0, x ∈ Reals}, Simplify[a b, x]]
Collect[a b, x] //. Assuming -> x > 0
$\text{True}^4 \left(\frac{y}{\text{True}^{3/8}}\right)^{7/9}$
$x^4 \left(\frac{y}{x^{3/8}}\right)^{7/9}$
Does anyone know how to do it correctly?
% // PowerExpand
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