а) 7 / ∛4 = (7 * ∛16) / (∛4 * ∛16) = (7 * ∛16) / (∛4³ ) = (7 * ∛16) / 4
б) ∛5 / (∛5 - 1) = [∛5 * (∛5² + ∛5 * 1 + 1)] / [(∛5 - 1)* (∛5² + ∛5+ 1)]=
= [∛5 * (∛5² + ∛5 + 1)] / [(∛5)³ - 1³] = [∛5 * (∛5² + ∛5 + 1)] / (5 - 1) =
= [∛5 * (∛5² + ∛5 + 1)] / 4
а) 7 / ∛4 = (7 * ∛16) / (∛4 * ∛16) = (7 * ∛16) / (∛4³ ) = (7 * ∛16) / 4
б) ∛5 / (∛5 - 1) = [∛5 * (∛5² + ∛5 * 1 + 1)] / [(∛5 - 1)* (∛5² + ∛5+ 1)]=
= [∛5 * (∛5² + ∛5 + 1)] / [(∛5)³ - 1³] = [∛5 * (∛5² + ∛5 + 1)] / (5 - 1) =
= [∛5 * (∛5² + ∛5 + 1)] / 4