(x^(-4)-y^(-4))/(x^(-2)-y^(-2) ) sama dengan …
Matematika
Khaerunisya19fun
Pertanyaan
(x^(-4)-y^(-4))/(x^(-2)-y^(-2) ) sama dengan …
1 Jawaban
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1. Jawaban dervila
= [(1/x)^4 - (1/y)^4] / [(1/x)^2-(1/y)^2]
= [(1/x)^2 - (1/y)^2][(1/x)^2 + (1/y)^2] / [(1/x)^2-(1/y)^2]
= [(1/x)^2 + (1/y)^2]
= x^(-2) + y^(-2)