You have gotten to the point .
Since is a positive value, it's equal to its absolute value.
So .
But .
Therefore .
Q.E.D.
If and , then .
Ok this is what I need to prove. I am fairly new to this so i'm not too sure what i have done is right, but here is what i have.
(subtract a)
(multiply by -1)
so (??? not sure after this point ???) . therefor so which equals .
Please if i have don something wrong correct me or if there is a better way of going about this that would be helpful too. Thanks for you help.