The equivalent expression of 5y⁻³ is 5 / y³
How find an equivalent expression of an expression?
Using law of indices,
a⁻ⁿ = 1 / aⁿ
Therefore,
5y⁻³
y⁻³ = 1 / y³
Hence,
5y⁻³ = 5 × 1 / y³
5 × 1 / y³ = 5 / y³
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