# Mathematical Solution in Inequality

1. Jan 19, 2014

### Quarlep

Hi I have a problem about Inequality.

Let's suppose we have a inequality like this:

$$axb≥d$$ and $$cxd≥d$$ so I want to find connection between a and d its possible to do something like that
Thanks

2. Jan 19, 2014

### Staff: Mentor

Just to be clear, is 'x' a variable or are you using it to indicate multiplication?

3. Jan 19, 2014

Is the second inequality meant to involve d on each side?

4. Jan 20, 2014

### Quarlep

İts a multiplication

5. Jan 20, 2014

### Quarlep

I am sorry.Here the right one

$$axb≥d$$
and $$cxf≥d$$

6. Jan 20, 2014

### mathman

With no further information, there isn't much you can say about the relationship between a and d. Furthermore, the second inequality is of no help.

Questions: sign of a, sign of d, sign and size of b.

Last edited: Jan 20, 2014
7. Jan 20, 2014

### Staff: Mentor

Because x is used so often in algebra, trig and higher mathematics disciplines, it's bad practice to use 'x' to indicate multiplication.

It's clearer to write your inequalities like this:

ab ≥ d
cf ≥ d

8. Jan 20, 2014

### pwsnafu

The times symbol is not $x$, it is $\times$. Use "\times" to get LaTeX to write it.