Simplify cube root of 729
Problem
Solution
Identify the number under the radical, which is
729 Determine the prime factorization of
729 by dividing by3 repeatedly.Calculate the factors:
729=3×243=3^2×81=3^3×27=3^4×9=3^5×3=3^6 Rewrite the expression using the exponent form of the cube root, which is
a^1/3 Apply the power of a power rule:
(3^6)^1/3=3^(6×1/3)=3^2 Evaluate the resulting power:
3^2=9
Final Answer
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