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a ) \sqrt[n]{x}
b )
2³√10 - ³√ -10 = 2³√ 10 - (-³√ 10) = 2³√ 10 + ³√ 10 = 3³√ 10
(2³√ -5)³ = 8 * (-5) = -40
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2³√10 - ³√ -10 = 2³√ 10 - (-³√ 10) = 2³√ 10 + ³√ 10 = 3³√ 10
(2³√ -5)³ = 8 * (-5) = -40