PreCalculus Notes: Laws of Exponents
PreCalculus Notes AS - 2: Radicals and Rational Exponents. nth Roots. Def: r is an nth root of a if rn = a. Ex: 5 and (5 are both square roots of 25 because 52 = 25 and ((5)2 = 25. Ex: (25 has no real square roots because there is no real number r such that r2 = (25. Remember: All positive numbers have two real square roots (one positive, one negative). Negative numbers have no real square ... ................
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