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## Homework Statement

What is the name of this when your try to prove this.... I want to know so I can search on google because this totally does not make any logical sence to me. This one does actually, however when I start having to manipulate I start getting lost.....

If : a/b = c/d = e/f ; Let equal to k then: k -----> a = kb ; c = kd ; e = kf

Prove : (2a^4b^2 + 3a^2e^2 - 5e^4f) / (2b^6 + 3b^2f^2 -5k^4f^5) = a^4/b^4