solve the equation with a rational exponent: x2/3 = 64

32
512
16
8

1 answer

To solve the equation \( x^{2/3} = 64 \), we first need to isolate \( x \).

  1. Raise both sides of the equation to the reciprocal of \( \frac{2}{3} \), which is \( \frac{3}{2} \):

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

  1. This simplifies to:

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

\[ x^1 = 64^{3/2} \]

  1. Now we calculate \( 64^{3/2} \). First, find \( 64^{1/2} \):

\[ 64^{1/2} = 8 \]

  1. Then, compute \( 8^3 \):

\[ 8^3 = 512 \]

  1. Thus, we have:

\[ x = 512 \]

So the solution to the equation \( x^{2/3} = 64 \) is \( \boxed{512} \).

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