Question

$(a^-5)^\frac1{5}\times(a^5)^\frac1{5}=?$

• A. a^10
• B. 1
• C. a^25
• D. a

Answer 1

Answer:

B. 1

$(a^-5)^\frac1{5}\times(a^5)^\frac1{5}$

$=(a^-5\times\frac1{5})\times(a^5\times\frac1{5})$

$=(a^{-1})\times(a^1)$

$=a^-1+1$

$=a^0$

$=1$