7. 9 10. 12. 13. lim (In e 2 If f (x) = x +sinx , then f '(x) A. I ...

D. sin x—xcosx B. I —cos.x E. sin x + xcosx cos(3x)] D. D. e E. nonexistent C. cosx C. 2cos3x x2-2 c. If y- A. D. cos2 3x, then 6sin 3x cos3x 6cos3x E. AT B. B. E. 2 3x 2 sin 3x cos3x x 2—1 (2x)10 x2—l then f '(x) dy If y = 10 , then c/x A. (In IO)IOX D. If D. 2x(ln 10)10 cos x—sin2x, then y' —2(cos x + sin x) 2(cos x C. -2 sin(2x) ... ................
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