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7. If y = 2 sinx - cos x, find y" at x = ? a. 1+ ~3 C. 1-213 2 2 1- 13 d. 1+21/3 2 2 8. If y = sin 3x 9 -, find y" at x =- II 6 a. b. -1 C . 0 9. Find the slope of the tangent to y = 1 - 2 sin x at the point where x = - a. 1 -1 C . d . 2 10. If A(x) = sin 3x, find f"| e best inodalle didexponential torestore a. w 9 b . - 3 . C . d. 11. If A(x) = cos?(nx) - sin (nx), find a. -823 C. 8x3 -8 d. -473 12. Find f'(x) if f(x) = 2e. a. 2e* C. * In 2 b. ex d. 2e 13. Find the equation of the tangent to y = "at the point (0, 1). a. y = x+1 C. y = ex+ 1 b. y=-x-1 d. y = x+1 14. If f(x) = 2x @", find f'(1). a. 2e C. 0 b. be d. 4e 15. Find the equation of the tangent to y = 38" + 3ex that is parallel to y = bex + 5. a. bex- y = 0 c. 6ex - y = be b. bex+ y = 0 d. bex+ y = be