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台灣大學 105 年度 微積分(C)

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100
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7 / 7
主要題型
Multiple integrals 2Derivatives 1Applications of differentiation 1Techniques of integration 1

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115Derivatives
Assume a (real valued) function y=f(x)y = f(x) satisfy y5+9y=x3+xy^5 + 9y = x^3 + x. Suppose g(x)g(x) is a (real valued) function satisfying f(g(x))=xf(g(x)) = x.
(a)5
The value g(1)g(1) must be 2. True or false? Answer: __(1)__.
(b)10
The derivative g(1)=g'(1) = __(2)__.
215Applications of differentiation
An experiment detects that a particle at (1,0)(1, 0) (on the xyxy-plane) is moving towards the north at the speed 3 meters per minute. At the same time another particle at (2,1)(-2, 1) is moving towards the east at the speed 4 meters per minute.
(a)5
Let s(t)s(t) be the distance (in meters) between the two particles in tt minutes. s(t)=s(t) = __(3)__.
(b)10
Suppose at t=t0t = t_0 the two particles are closest to each other. Then t0=t_0 = __(4)__.
310Techniques of integration
Compute the indefinite integral dx(2x1)(x+1)=\int \frac{dx}{(2x-1)(x+1)} = __(5)__.
410Applications of integration
Let Ω\Omega be a region (on the xyxy-plane) enclosed by x=lnyx = \sqrt{ln y}, x=0x = 0 and y=ey = e. Let SS be the solid obtained by revolving Ω\Omega about the yy-axis. Let VV be the volume of SS. V=V = __(6)__.
520Derivatives of multi-variable functions
Let f(x,y)=x2exy2f(x,y) = x^2 - e^{xy^2} and the surface SS be the graph of the function z=f(x,y)z = f(x,y). Let P=(1,0,0)SP = (1,0,0) \in S and p=(1,0)p = (1,0) in the xyxy-plane.
(a)10
If the unit vector uu (in the xyxy-plane) at pp is the direction (among all directions at pp) along which the height (i.e. the value of zz) of SS increases most rapidly, then u=u = __(7)__.
(b)10
Write HH for the plane x+2y+3z=1x + 2y + 3z = 1 and the curve CC for the intersection SHS \cap H. Let LL be the tangent line to CC at PP and NN be the plane perpendicular to LL at PP. Then the equation of NN is __(8)__.
615Multiple integrals
Let RR be the region enclosed by y=xy = x, y=x2y = x - 2, y=1y = 1 and y=0y = 0.
(a)10
Let AA be the area of RR. A=A = __(9)__.
(b)5
The double integral Rxydxdy=\iint_R \sqrt{x - y} \, dx dy = __(10)__.
715Multiple integrals
Let Ω\Omega be the region {(x,y)(x1)2+y2<1}\{(x,y) | (x-1)^2 + y^2 < 1\}. Evaluate the double integral Ω1xdxdy\iint_\Omega \frac{1}{x} \, dx dy.