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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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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