Question

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.

Answer 1

1st step and 3rd step is my only complaint

Answer 2

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

Answer 3

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?

Answer 4

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

Answer 5

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