Sum
If `a/b = 2/3` then find the values of the following expression
`[a^3 + b^3]/b^3`
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Solution
`a/b = 2/3`
⇒ `a^3/b^3 = 8/7` ........( Cubing both sides)
Applying componendo, we get
`[a^3 + b^3]/b^3 = [8 + 27]/27`
`[a^3 + b^3]/b^3 = 35/27`
Concept: Operations on Equal Ratios
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