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7.1 nth Roots & Rational Exponents. n th roots. Solutions. n is called the index If n is odd, there is one real root If n is even AND , there are two real roots If n is even AND , the real root is zero If n is even AND , there are NO real roots. Notation.

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## 7.1 nth Roots & Rational Exponents

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**Solutions**• n is called the index • If n is odd, there is one real root • If n is even AND , there are two real roots • If n is even AND , the real root is zero • If n is even AND , there are NO real roots**Examples**• Find the nth roots of a without a calculator**Examples**• Rewrite in radical form first, then evaluate without a calculator**Solving Equations**• To solve equations using nth roots • Isolate the nth root term • Follow regular solving equation rules**Examples**HW: p404-405 #14-60even

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