hi everyone. first of all i have to apologize for my poor English.

I've got an inequality which I know is true but don't know how to solve,can anyone help?

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- Nov 17th 2012, 04:42 AMVimsolving inequality.
hi everyone. first of all i have to apologize for my poor English.

I've got an inequality which I know is true but don't know how to solve,can anyone help?

- Nov 17th 2012, 06:52 AMveileenRe: solving inequality.
That isn't an inequality.

Anyway, .

**I.**

Let's consider the functions , .

is strictly increasing;

is strictly decreasing, so is strictly increasing;

is strictly increasing (being a sum of two strictly increasing functions) f is injective, and therefore .

**II.**

, for any f is injective, and therefore .