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1.Compute the following limit: 1 n (a) lim - Σ √[(3i/n)^7+(3i/n)^4] n→∞ n i=1 X 1 (b) lim [ (-----)-(-----)]. n→∞ lnX X-1 x e ln(x+e) 1 2.Let f(x)=∫ -------------- dx defined on (-1,∞). 1 √(x^4+x^2+5) (a) Show that f is a strictly increasing function. -1 (b) Find (f )'(0). 1 -2/3 3.Compute the improper integral ∫ x lnx dx. 0 ∞ n n n 4.Find the radius of convergence of the infinite series Σ (------) x . n=0 2n+1 5.Let f be a real valued function defined on R with f"(x)>0 for all x. Show that f(x) ≧ f'(0)x + f(0) for all x. 1 √(1-x^2 ) 2 2 6.Compute the iterated integral ∫∫ sin(x +y )dydx. 0 0                               1 8 7.Find the local extreme values of the function f(x,y)= xy +-+- for xy ≠ 0.                               x y 8.Use the method of Lagrange Multiplier to find the maximum value of the 3 function f(x,y,z) = x+3y-2z defined on R subject to the constraint 2 2 2 x +y +z =14. 以上也煩請版上的高手大大們幫忙解惑一下 感謝! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 124.8.169.245
Honor1984:同學 你要不要自己寫出一些想法阿? 122.124.99.94 07/11 02:23
LuisSantos:弟5題看第5253篇文章 61.66.173.21 07/11 02:23
LeoRen:1(a)黎曼積分 (b)合併分式求極限 118.161.145.99 07/11 02:27
LeoRen:2(a)利用Leibniz微分求f'(x);(b)反函數定義 118.161.145.99 07/11 02:29
LeoRen:4.收斂半徑定義 r=lim|a_n+1/a_n|<1, n->oo 118.161.145.99 07/11 02:40