# Notation question

• Sep 26th 2011, 11:04 AM
beebe
Notation question
When I'm doing problems where I'm finding a tangent line, I find it cumbersome to write out the part where I'm expressing the slop of the line at x=(some value). Is there a notation for expressing the slope of the tangent line to a function at a specific x value?
• Sep 26th 2011, 11:53 AM
skeeter
Re: Notation question
Quote:

Originally Posted by beebe
When I'm doing problems where I'm finding a tangent line, I find it cumbersome to write out the part where I'm expressing the slop of the line at x=(some value). Is there a notation for expressing the slope of the tangent line to a function at a specific x value?

if the function is $f(x)$, then the slope at $x = c$ would be $f'(c)$