# Math Help - Show that u is a linear function of v -calculus

1. ## Show that u is a linear function of v -calculus

For u =

ln([f(x)/A] / [1-(f(x)/A))

And v = lnx

Show that u is a linear function of v.

Any hints? I'm not sure what the capital "A" is supposed to represent, I've never seen it before. Maybe just a general constant? I don't know...

2. Originally Posted by theowne
For u =

ln([f(x)/A] / [1-(f(x)/A))

And v = lnx

Show that u is a linear function of v.

Any hints? I'm not sure what the capital "A" is supposed to represent, I've never seen it before. Maybe just a general constant? I don't know...
You need to show that:

$\frac{du}{dv}=c$

where $c$ is a constant. Use:

$\frac{du}{dv}=\frac{du}{dx}~\frac{dx}{dv}$

RonL