所屬科目:研究所、轉學考(插大)-微積分
(a) (5 points) Evaluate the limit
(b) (5 points) Find the horizontal asymptote of the graph y =for x >0 if it exists.
2. (10 points) Define f(x) = for x ≠2. Give a value of f(2) x-2such that f is continuous at 2.
3. (10 points) Let f(x) =
be the invesse function of f. A curve C satisfies the equation 2x2y + xy2 = 8. Find a point (a, b) such that
(a) (5 points) Find the Taylor expansion for f about x = 0. (In the fomm with a general formula for ak)
5. (10 points) Let u(x,y) be a differentiable function with (4,1) = 2. dy Suppose that x = st and y= and define h(s, t) = u(x(s, t),y(s, t). At the point (2,2), find a unit vector u in the st-plane such that h increases most rapidly in the direction. (4, 1) = 1 and
6. (10 points) Suppose that f(π) = 4 and [f(x) + f"(x)] sin x dx = 5. Find f(0).
7. (10 points) Find the arc length of the part of the curve r = 1 + sin θ which is inside the curve r = 3 sin θ (the solid curve in the figure).
9. (10 point) Evaluate the double integral where D is the trapezoid in the first quadrant with vertices (2,0), (4,0), (0, 4) and (0,8).
10. (10 points) Let F(x, y, z)= k. Compute the surface integral (using the outward pointing normal), when S is the surface x2 + y2 + z2 = 225.