Question

if a/b=c/d prove that each given ratio is equal to (5a^3-13c^3/5b^3-13d^3)^1/3

Answer 1

Answer:

if

ab=cd prove that each of the given ratio is equal to:

(8a3+15c38b3+15d3)13

SOLUTION

Let

ab=cb=k

Then a = bk and c = dk

(8a3+15c38b3+15d3)13= [8(bk)3+15(dk)38b3+15d3]13=[k3(8b3+15d3)8b3+15d3)]13=k = each given ratio