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4) =![( sqrt[5]{a} - sqrt[5]{b}) ( sqrt[5]{a} + sqrt[5]{b})](https://tex.z-dn.net/?f=%28+sqrt%5B5%5D%7Ba%7D+-+sqrt%5B5%5D%7Bb%7D%29+%28+sqrt%5B5%5D%7Ba%7D+%2B+sqrt%5B5%5D%7Bb%7D%29+ "( sqrt[5]{a} - sqrt[5]{b}) ( sqrt[5]{a} + sqrt[5]{b})")
5.a)![frac{ sqrt[14]{ x^{23} } }{ sqrt[28]{ x^{18}} } = frac{ x^{ frac{23}{14} } }{ x^{ frac{9}{14} } } = x^{ frac{14}{14} } =x](https://tex.z-dn.net/?f=+frac%7B+sqrt%5B14%5D%7B+x%5E%7B23%7D+%7D+%7D%7B+sqrt%5B28%5D%7B+x%5E%7B18%7D%7D+%7D+%3D+frac%7B+x%5E%7B+frac%7B23%7D%7B14%7D+%7D+%7D%7B+x%5E%7B+frac%7B9%7D%7B14%7D+%7D+%7D+%3D+x%5E%7B+frac%7B14%7D%7B14%7D+%7D+%3Dx "frac{ sqrt[14]{ x^{23} } }{ sqrt[28]{ x^{18}} } = frac{ x^{ frac{23}{14} } }{ x^{ frac{9}{14} } } = x^{ frac{14}{14} } =x")
5.б) =![sqrt[3]{216 x^{3} } =6x](https://tex.z-dn.net/?f=+sqrt%5B3%5D%7B216+x%5E%7B3%7D+%7D+%3D6x "sqrt[3]{216 x^{3} } =6x")
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