Let f(x)=x^2-3x and P=(1, f(x)). Find the slope of the curve y=f(x) at P, an equation of the tangent to P, and an equation of the normal at P.

Question

anonymous · Answer

attachment

myininaya · Answer

1st step and 3rd step is my only complaint

myininaya · Answer

1st step the definition is wrote out wrong
3rd step -(x^2-3x)=-x^2+3x

anonymous · Answer

What is wrong with the first step?
Ohh, that was a typo when typing onto my computer >< but I wrote it correctly on paper.
Is A correct?

myininaya · Answer

A is correct 
but definition of derivative is
$$\lim_{h \rightarrow 0}\frac{f(x+h)-f(x)}{h} $$

anonymous · Answer

Oops, another typo! 
Can you help me with B?