ntu dt科系、各科系英文、台大系所代碼在PTT/mobile01評價與討論，在ptt社群跟網路上大家這樣說

課程名稱︰微積分乙下
課程性質︰必帶
課程教師︰張樹城
開課學院：生科院
開課系所︰生科系.生技系
考試日期（年月日）︰2017/4/27
考試時限（分鐘）：110

試題 :

I.(10%) Compute the followings:
(i) Find the limit of the squence:
根號2, 根號(2+根號2), 根號(2+根號(2+根號2)),....

x^2*y
(ii) lim ─────
(x,y)→(0,0) x^4+2*y^2



II.(10%) Verify following infinite series coverge or diverge?
∞ n^n
(i) Σ ─────
n=1 n!

∞ 1
(i) Σ (-1)^n ───
n=1 根號n



III.(10%) Determine all x in which the following power series converge:
∞ x^n
(i) Σ ─────
n=1 n!

∞ x^n
(i) Σ (-1)^n ───
n=0 n+1


IV.(10%)
(i) Find the Maclaurin's series for the function f(x) = sin x at x=0.

1 1
(ii)Find lim (─── - ───)
x→0 sin x x


V.(10%) Find (z對x偏微分) and (z對y偏微分) at (0,0,0) for
x^3+z^2+ye^(xz)+zcosy=0

VI.(10%) Define xy(x^2-y^2)
────── (x,y)≠(0,0)
f(x,y) = x^2+y^2

0 (x,y)=(0,0)

Compute fxy(0,0)和fyz(0,0).



VII.(15%)
(i)Find the normal line and tangent plane to the surface x^2+y^2+z=9
at(1,2,4)
(ii)Use the linearization method to find the approximate of
(根號27)*(三次根號1021)


VIII.(10%)
Find the absolute maximum and minimum values of f(x,y)=x^2+3y^2+2y
over the unit disk D={(x,y):x^2+y^2 <=1 }


IX.(15%)Let f(x,y) have continuous partial derivatives in an open region D
in R^2 containing a point (a,b) where fx(a,b)=fy(a,b)=0.

Define F(t):=f(a+th,b+tk), 0<=t<=1

and Q(t):=[h^2*fxx(a+th,b+tk)+2hk*fxy(a+th,b+tk)+k^2*fyy(a+th,b+tk)],

(i)By using the chain rule to show that
d
─F(t)=h*fx(a+th,b+tk)+k*fy(a+th,b+tk)
dt

and

d^2
── F(t)=Q(t)
dt^2


(ii)By using the Taylor theorem to show that
f(a+h,b+k)=f(a,b)+1/2*Q(t)
from c between 0 and 1.

--