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eksponen
((2a⁵b) / (16a²b⁴))^-1
= (16a²b⁴) / (2a⁵b)
= 16/2 . a²/a⁵ . b⁴/b
= 8 . 1/a^(5 – 2) . b^(4 – 1)
= 8 . 1/a³ . b³
= 8b³/a³