Assinale a opção incorreta:
(A)
[tex] \sqrt[5]{3} ^{2} \: = 5 \frac{2}{3} [/tex]
(b)
[tex] \sqrt[4]{x} ^{3} \: = x \frac{3}{4} [/tex]
(c)
[tex] \sqrt[3]{7} ^{2} = 7 \frac{2}{3} [/tex]
(d)
[tex] \sqrt[3]{6} = 6 \frac{1}{3} [/tex]
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