Assinale a alternativa correta:

a)
[tex] \sqrt[4]{ - 81} = - {3}^{3} [/tex]



b)
[tex] \sqrt[3]{ - 27} = {3}^{3} [/tex]



c)
[tex] \sqrt{4.6} = \sqrt{4} \: \: \: \: .\: \: \: \sqrt{6} [/tex]



d)
[tex] \sqrt[3]{ {2}^{2} } = {2}^{ \: \: \: 3/2} [/tex]
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