Math Problem Statement

What is the cube root of 729?

Solution

The problem asks us to calculate the cube root of 729729, denoted as 7293\sqrt[3]{729}.

Solution:

  1. The cube root of a number is the value that, when raised to the power of 3, equals the original number. That is, if x=7293x = \sqrt[3]{729}, then x3=729x^3 = 729.

  2. Start by factoring 729729: 729=3×3×3×3×3×3=36729 = 3 \times 3 \times 3 \times 3 \times 3 \times 3 = 3^6

  3. Now, apply the cube root: [ \sqrt[3]{729} = \sqrt[3]{3^6} = 3^{6/3} = 3^2 = 9 ]

Final Answer:

9\boxed{9}

Would you like a breakdown of any step or further clarification?


Here are 5 related questions you might find interesting:

  1. What is the fourth root of 256?
  2. How do cube roots relate to exponents and radicals?
  3. Can you compute 17283\sqrt[3]{1728}?
  4. How do you simplify 27x63\sqrt[3]{27x^6}?
  5. What is the cube root of a negative number, such as 643\sqrt[3]{-64}?

Tip: When solving roots or powers, prime factorization can simplify calculations significantly.

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Math Problem Analysis

Mathematical Concepts

Radicals
Exponents
Cube Roots

Formulas

Cube root formula: x = \( \sqrt[3]{a} \)
Laws of exponents: \( a^{m/n} = (a^m)^{1/n} \)

Theorems

Exponentiation rules

Suitable Grade Level

Grades 8-10