2-49. The slope of a tangent to a curve ent at a given point is m . Therefore, the slope of the normal to the tute curve at this same point is the Suppa of 1. inverse of m P 2. negative of m ing e 3. negative reciprocal of m 4. same as m 2-50. The length of the normal is defined as that portion of the normal line between the point P(x, y) and the sion X axis 2. Y axis a 3. origin 4. point P(x, 0) P, ( x , , y , ) X 2 O Figure 2B. --Curve with tangent and normal lines. IN ANSWERING ITEM 2-51, REFER TO FIGURE 2B. 2-51. The lengths of the tangent and normal are represented, en respectively, by 1. NM and RN 2. P, M and P, N PIN and P, R 4. P, M and PJ R at at 2-52. If x2 + y2 = 4, then the length of the tangent at (1, /3) is 2. 3. 12 12