Question

express 81-³ as a power with base 3
answer by method
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Answer 1

Answer:

First factorize 81

81 = 3 × 3 × 3 × 3 = 3⁴

then, 81 ⁻³ = (3⁴)⁻³

( by using exponential property )

=> (aⁿ) ᶻ = a^ (n × z)

=> 3^ [4 × (-3)]

=> 3^ (-12)

=> 3 ⁻¹²

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