AP Calculus Free-Response Questions

shown in the figure. 7. a. Sketch the graph of y = . b. Let R be a point on the curve and let the x-coordinate of R be r (r 0). The tangent line to the curve at R. crosses the x-axis at a point Q. Find the coordinates of Q. c. If P is the point (r, 0), find the length of PQ as function of r and the limiting value of this length as r. increases ... ................
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