Solve the following equation with a rational exponent x2/3 = 64

1 answer

To solve the equation \( x^{2/3} = 64 \), we can follow these steps:

  1. Raise both sides to the reciprocal of the exponent: Since the exponent on \( x \) is \( \frac{2}{3} \), we can raise both sides of the equation to \( \frac{3}{2} \):

    \[ \left( x^{2/3} \right)^{3/2} = 64^{3/2} \]

  2. Simplify the left side: The left side simplifies to:

    \[ x^{(2/3) \cdot (3/2)} = x^1 = x \]

  3. Calculate the right side: Now we need to calculate \( 64^{3/2} \). This can be done in two steps:

    • First, find the square root of 64: \[ \sqrt{64} = 8 \]

    • Then raise this result to the power of 3: \[ 8^3 = 512 \]

Thus, we have:

\[ x = 512 \]

  1. Conclusion: The solution to the equation \( x^{2/3} = 64 \) is

\[ \boxed{512} \]