Answer
$3x^\frac{1}{4}$
Work Step by Step
$\frac{15x^\frac{3}{4}}{5x^\frac{1}{2}}=\frac{15}{5}\times\frac{x^\frac{3}{4}}{x^\frac{1}{2}}=3x^{\frac{3}{4}-\frac{1}{2}}=3x^\frac{1}{4}$
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