Math Is Fun Forum

Naresh

Member

Registered: 2006-09-29

Posts: 15

Need help in proving simple inequality

the inequality is

-(a^2)-(b^2)-(c^2)+ac-ab+bc-a(c^2)+(a^2)b-(b^2)c+a(b^2)+b(c^2)  <= 1.Given that abc = 1 and a,b,c are real and positive numbers.

Stas B.

Guest

Re: Need help in proving simple inequality

If abc = 1 and they are real and positive numbers, doesn't that make all three of them equal to 1?

Stas B.

Guest

Re: Need help in proving simple inequality

Oh my god... Ignore that last post please... *BLUSHES*

Naresh

Member

Registered: 2006-09-29

Posts: 15

Re: Need help in proving simple inequality

Oh my god... Ignore that last post please... *BLUSHES*

kk i understood your mistake

Naresh

Member

Registered: 2006-09-29

Posts: 15

Re: Need help in proving simple inequality

Hey is nobody going to try and help me?

luca-deltodesco

Member

Registered: 2006-05-05

Posts: 1,470

Re: Need help in proving simple inequality

lol, thats not exactly a 'simple' inequality, simple kind of implied 2x + 4 > 8 or something

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Naresh

Member

Registered: 2006-09-29

Posts: 15

Re: Need help in proving simple inequality

True true,Its my national olympiad problem which i was not able to crack and i lost out.I am really bugged at that one.