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Inequality with Max. and Min.value.

  • Thread starter man111
  • Start date
  • #1
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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....

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
318
0
So what exactly is your problem?
The Minimum value is easy to argue.
I wonder how you found the maximum value using calculus because that involves solving a degree 5 polynomial.
You could post your answers then we can discuss a bit more.
 

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