Re: [考古] 台聯大 96 搶先報~
看板trans_math作者antirazin (今年是日星來台年~真嗨)時間17年前 (2007/07/14 21:46)推噓16(16推 0噓 6→)留言22則, 11人參與討論串6/9 (看更多)
※ 引述《ROGER2004070 (痛定思痛)》之銘言:
: ※ 引述《EricDampier (蛋皮)》之銘言:
: : 監試人員一時糊塗...竟然說考卷給你們帶回去當禮物
: : 後來第二節他去問才知道試卷也要收回
: : 所以就被拿回來當禮物了...
: : 甲.填充
: : 1. if f is a continuous function such that
: : x x
: : ∫f(t)dt = x.exp(2x) + ∫exp(-t)f(t)dt for all x,
: : 0 0
: : find an explicit formula for f(x)
: : 2. in what direction is the derivative of
: : (x^2+y^2)
: : f(x,y) = ───── at P(1,1) equal to zero?
: : (x^2-y^2)
: : 3. find the maximum value of x^2 + y^2 subject to the constraint
: : x^2 - 2x + y^2 - 4y = 0
: : 4. suppose that f(0) = -3 and f'(x) <= 5 for all values of x
: : how large can f(2) possibly be?
: : 5. find the tangent plane of the surface
: : cos(πx) - x^2.y + exp(xz) + y.z = 4
: : x-2y
: : 6. evaluate ∫∫ ─── dA , R is the parallelogram enclosed by the lines
: : R 3x-y
: : x-2y = 0 , x-2y = 4 , 3x-y = 1 , 3x-y = 8
: : 7. find the area of surface cut from parabloid x^2 + y^2 - z = 0 by the
: : plane z = 2
: : 8. evaluate ∮(6y+x)dx+(y+2x)dy , C : (x-2)^2 + (y-3)^2 = 4
: : C
: : 乙.計算,證明
: : 1. evaluate the following limits
: : tan(2x) n √(n^2 - j^2)
: : (a) lim (tan x) (b) lim (Σ ───────)
: : x→(π/4)- n→∞ j=1 n^2
: 1.(a)
: tan(2x)ln(tan x)
: lim e
: x→(π/4)-
: lim tan(2x)ln(tan x)
: x→(π/4)-
: = e
: ln(tan x)
: lim -------------- .................(∞/∞) 羅必達
: x→(π/4)- cot(2x)
: = e
: sec^2(x) 1
: lim ------------- --------------
: x→(π/4)- tan x -2csc^2(x)
: = e ^^^^^^^^^^^
那個......這邊是-2csc^2(2x)吧......
: 1 cos(x) sin^2(x)
: lim (----------) * (-----------) * (------------)
: x→(π/4)- cos^2(x) sin(x) -2
: = e
: -1 sin(x)
: lim (---) * (----------)
: x→(π/4)- 2 cos(x)
: = e
: -1
: (-----)
: 2
: = e
我最後算出來是e^(-1)不知道對不對@@"
: : ∞ n ln(n)
: : 2. (a) test the series Σ (-1) ──── for convergence or divergence
: : n=1 n-ln(n)
: : ∞ x^n
: : (b) let f(x) = Σ ── find the intervals of convergence for f' & f''
: : n=1 n^2
: : 3. evalute
: : a/√2 √(a^2-y^2)
: : (a) ∫ ∫ exp(x^2+y^2) dxdy
: : 0 y
: : 8 2 dydx
: : (b) ∫ ∫ ────
: : 0 x^(1/3) y^4 + 1
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 61.230.177.103
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