EX #9: Given the implicit curve, x2 + In = 1 ; A. Write the linear approximation of the tangent line --2- at x = 1. (1.25, k) (1, 1) .N B. Using the tangent line to the curve at x = 1, find the number k such that the point (1.25, k) is on the curve. C. Calculate the error of the approximation