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40. What is my of the implicit equation x + 2y + 2y2 = 2? A. -1 2 +4y -4 -4 (2+4y)3 2 + 4y -1 (1+2y) 41. The f"(x) of the function f(x) = arccot(tan3x2) is? A. -6 -1 B. -6x 1+tan3x2 D. -sec3x2 42. Given u = exyz, find -at point (1, 1,1). A. 5c C. 2e B. 3e D. 4e 43. Given M = el-xcos(y) + ze-1/(1+y), find M at the point (1,0, I). A. -1 C. 0 B. -1/e D. n/e 44. Given z = xy x4yz' find By Ox x' +6x yzty C. _ x-6xylty A. (x2 +yz)3 D. _X-oxyty * +6xylty (x ] + x 3 ) (x2 +y?)+ 45. Find y' of the function y = 2x2x C. (2 + 2In2x)2xx A. 2Inx D. (1 + Inx)4x2x B. 4Inx(x)