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## Homework Statement

If [tex]x,y\in R[/tex] and [tex]x+y=1[/tex].then find max. and Min. value of [tex](x^3+1)(y^3+1)[/tex] (Without using calculus)

## Homework Equations

here [tex]x+y=1[/tex] and [tex](x^3+1)(y^3+1)[/tex]

## The Attempt at a Solution

I have done using Calculus....