Another complex calc question?

[horses48]

Can someone help me figure this out?


http://i490.photobucket.com/albums/rr26 ... /calcc.jpg


Thanks! I'm not sure if I did this right. I got 120x? But it has to be a decimal?

 

[galactus]

set f(x)=100 and solve for x.

Then, note how far this is from 1. That is delta.

$\displaystyle \frac{5x}{6x-6}=100$

$\displaystyle x=\frac{120}{119}=1.00840336134$

See delta now?.