If 2a = (32)1/3, then a is equal to:

2023

If 2a = (32)1/3, then a is equal to:

  1. A.

    1/3

  2. B.

    4/5

  3. C.

    4/8

  4. D.

    5/3

Show answer & explanation

Correct answer: D

When two powers with the same base are equal, their exponents must be equal — so to solve for an unknown exponent, first rewrite both sides as powers of one common base.

  1. Express 32 as a power of 2: 32 = 25.

  2. Substitute into the equation: 2a = (25)1/3.

  3. Apply the power-of-a-power rule (multiply the exponents): (25)1/3 = 25/3.

  4. Both sides now share the base 2: 2a = 25/3.

  5. Since the bases match, equate the exponents directly: a = 5/3.

Check: cubing 25/3 gives 25 = 32, which matches (32)1/3 cubed back to 32 — confirming the value is consistent.

So a = 5/3.

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