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[tex] \sqrt[ 4]{a} = 9[/tex]
[tex] \sqrt[n]{81} = 3[/tex]
ajuda
[tex] \sqrt[ 4]{a} = 9[/tex]
[tex] \sqrt[n]{81} = 3[/tex]
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[tex]\sqrt[4]{a} = 9\\ \sqrt[4]{a^4} = 9^4\\a = 6561[/tex]
[tex]\sqrt[n]{81} = 3\\\sqrt[n]{81^n} = 3^n\\81 = 3^n\\3^4 = 3^n\\n = 4[/tex]