17. (1 point) Suppose f(x) = x3 tan-1(3x). Find: 21. (1 point) Suppose x - 2y = x +4. Find the slope m of f'(x) =. the tangent line to the curve at the point (1, ). m = 18. (1 point) Suppose f(x) = tan-1(7*). Find: 22. (1 point) Suppose y = In(x2 + y2). Find: f' (x) = y' (1) =_ 19. (1 point) Suppose 5x2 + 4x + xy = 5 and y(5) = -28. Find: 23. (1 point) Suppose f(x) = 9xin(x). Find: y' (5) = f'(10) = [Recall: In(ab) = In(a) + In(b).] 20. (1 point) Suppose xe - 3y = 4x -7 + le and y(1) = 1. Find: 24. (1 point) Suppose f(x) = 6(sin(x))*. Correct to 4 deci- mals, find: y(1) = f'(1) = [Recall: In(ab) = In(a) + In(b).]