slope of curve

**live_laugh_luv27** · August 9th 2009, 07:54 AM

For $f(x)=5x^2$ at the point (2,20), find
a) slope of curve
b) an equation of the tangent line
c) an equation of the normal line

Here is what I have so far:
a) $m=20$
b) $y-20=20(x-2)$
c) $y-20=-\frac{1}{20}(x-2)$

Is my work correct? Thanks!

**Plato** · August 9th 2009, 08:04 AM

Originally Posted by live_laugh_luv27

For $f(x)=5x^2$ at the point (2,20), find
a) slope of curve
b) an equation of the tangent line
c) an equation of the normal line

Here is what I have so far:
a) $m=20$
b) $y-20=20(x-2)$
c) $y-20=-\frac{1}{20}(x-2)$

Is my work correct?

YES

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