• Oct 15th 2013, 05:17 AM
fatlind
Solve equations :

1)

Attachment 29476

2)

Attachment 29477

3)

Attachment 29478

Please Help Me . If i solve these , i will have the best mark ever in math in my entire life !
• Oct 15th 2013, 06:07 AM
topsquark
Quote:

Originally Posted by fatlind
Solve equations :

1)

Attachment 29476

2)

Attachment 29477

3)

Attachment 29478

Please Help Me . If i solve these , i will have the best mark ever in math in my entire life !

This sounds like a graded assignment. All we can do is give you pointers. The main thing is to show your work. Have you been able to make any progress on these?

-Dan
• Oct 15th 2013, 06:17 AM
fatlind
Quote:

Originally Posted by topsquark
This sounds like a graded assignment. All we can do is give you pointers. The main thing is to show your work. Have you been able to make any progress on these?

-Dan

Yes . But everything I've done won't worth . someone else
• Oct 15th 2013, 06:32 AM
topsquark
Quote:

Originally Posted by topsquark
This sounds like a graded assignment. All we can do is give you pointers. The main thing is to show your work. Have you been able to make any progress on these?

-Dan

Let's look at the first one. For starters if $|y| \leq k$ the we know that $-k \leq y \leq k$. So your first problem becomes:
$\left | \frac{x}{x - 1} \right | \leq 1 \implies -1 \leq \frac{x}{x - 1} \leq 1$

What can you do with this?

-Dan
• Oct 15th 2013, 07:38 AM
SlipEternal
Keep track of the direction of the inequalities. They are reversed if you multiply the inequality by a negative number. So, if you want to multiply across the inequality by $x-1$, you need to consider two cases: when $x-1>0$ and when $x-1<0$.