[填空题]
Part of the graph of y=f(x) is shown below. The pogquu;v cl :fd;3qq/t,d*ctqk io 8+j7int A(3,4) lies on the, nasfp 05hw0 -rjbly. graph.
5,wnjp.h0syba rl- f 0 1.Write down the value of f(3). f(3) =
The tangent line L to the graph of y=f(x) at point A has equation y=3x−5.
2.Find the equation of the normal line N to the graph of y=f(x) at point A. Give your answer in the form ax+by+d=0, where a,b,d∈Z. ax+by+c=0 a = b = c =
3.Draw the lines L and N on the same grid above, labelling the intercepts with the axes.
