Math Problem Statement

xm3>−12

Solution

To solve the inequality x3>12x^3 > -12, follow these steps:

  1. Interpret the inequality: The goal is to find the values of xx such that the cube of xx is greater than 12-12.

  2. Rewrite the inequality: x3>12x^3 > -12

  3. Isolate xx: Take the cube root on both sides. Since the cube root function is monotonic (it preserves the inequality's direction), we can write: x>123x > \sqrt[3]{-12}

  4. Simplify 123\sqrt[3]{-12}: The cube root of 12-12 is approximately 2.29-2.29.

    So, the solution is: x>2.29x > -2.29

Final Answer:

The solution set is: x(2.29,)x \in (-2.29, \infty)


Would you like further explanation or help plotting this inequality on a graph?

5 Related Questions:

  1. What are the rules for solving inequalities involving exponents?
  2. How does the cube root differ from the square root in terms of preserving inequality direction?
  3. What happens if the inequality is x312x^3 \geq -12 instead of x3>12x^3 > -12?
  4. How would this inequality change if it was x3<12x^3 < -12?
  5. What are the steps to approximate cube roots of non-perfect cubes?

Tip:

For cube roots of negative numbers, remember that the cube root of a negative number is also negative (e.g., 83=2\sqrt[3]{-8} = -2).

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Math Problem Analysis

Mathematical Concepts

Algebra
Inequalities
Exponents and Roots

Formulas

Cube root function: x = ∛a

Theorems

Monotonicity of odd roots

Suitable Grade Level

Grades 9-11