Tolong ya caranya cari r nya

Tolong ya caranya cari r nya

$a. frac{ {r}^{5} }{ {r}^{3} } = frac{32}{8} \ = {r}^{5 - 3} = 4 \ = {r}^{2} = 4 \ r = sqrt{4} = 2 \ b. frac{ {r}^{5} }{ {r}^{2} } = frac{4}{32} \ = {r}^{5 - 2} = frac{4}{32} \ = {r}^{3} = frac{4}{32} \ r = sqrt[3]{ frac{4}{32} } \ r = frac{ sqrt[3]{4} }{sqrt[3]{32} }$

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