x³ – 11. What is dx ? х-1 x2 + 2x + C x3 x3 A. + C B. +x+ C C. 3 D. x(2x²+3x+6) + C 12. In solving S dx, which substitution should be used? In x С. и А. и %3 1 В. и %3D Inx D. u = In(ln x) %3D

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