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Simplify (m^(1/3) n^(−2))^(3/5).

A. m^(1/5) n^(−6/5)
B. m^(1/5) n^(6/5)
C. m^(1/5) n^(−6/5)·n
D. m^(1/5) n^(1/5)
Correct Answer: A. m^(1/5) n^(−6/5)

Correct answer: m^(1/5) n^(−6/5). Multiply each exponent by 3/5: m has (1/3)(3/5) = 1/5 and n has (−2)(3/5) = −6/5.

Background: The rule is (aᵐ)ⁿ = aᵐⁿ.

  • m^(1/5) n^(6/5): This option makes the exponent of n positive.
  • m^(1/5) n^(−6/5)·n: This option adds an extra factor of n.
  • m^(1/5) n^(1/5): This option does not multiply the exponent of n correctly.

Did you know? Multiply the outside power with each exponent inside.

Memory trick: Power outside multiplies inside.

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