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▪︎ a-¹ = (1/a)¹ {Any power} ---(1)
▪︎ a⁰ = 1. ---(2)
=》 (5/9)-²×(3/5)-³×(3÷5)⁰.
= (9/5)²×(5/3)³×1
{From ids (1) and (2).}
= (81/25) × (125/27) × 1.
= 10125/675
Therefore your answer is 15.
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