3,12,11,5,14,( ) A.9 B.10 C.11 D.13

合并同类项：a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a+12a+……+2008a+2009a-2010a-2011a a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a= 逻辑运算中A表示什么　(1) 0 · A = 0 (10) 1' = 0; 0' = 1　　(2) 1 · A = A (11) 1 + A = 1　　(3) A · A = A (12) 0 + A = A　　(4) A · A' = 0 (13) A + A = A　　(5) A · B = B · A (14) A + A' = 1　　(6) A·(B·C) = (A·B)·C (15) A a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a.+2008a+2009a-2010a-2011a如何合并同类项? 逻辑运算中的A表示什么　(1) 0 · A = 0 (10) 1' = 0; 0' = 1　　(2) 1 · A = A (11) 1 + A = 1　　(3) A · A = A (12) 0 + A = A　　(4) A · A' = 0 (13) A + A = A　　(5) A · B = B · A (14) A + A' = 1　　(6) A·(B·C) = (A·B)·C (15 英语翻译1 light fingers 2 a light adaptation 3 light bobs 4 a light car 5 a light chain 6 a light bomber 7 a light eater 8 light colonel 9 light artillery 10 a light box 11 a light cruiser 12 light air 13 a light touch 14 a light step 15 a light (3a+5)-{9a-[6a+2-(12a-10)+2(a+1)]} （3a+5)-{9a-[6a+2-(12a-10)+2(a+1)] 9a*a*a*a-()=(3a*a+5c)(3a*a-) LINGO错误,这段程序为什么会出现以下错误:程序：clc;clear;M=1000;a(1,2)=8; a(1,3)=5;a(1,4)=9;a(1,5)=12;a(1,6)=14;a(1,7)=12;a(1,8)=16;a(1,9)=17;a(1,10)=22;a(2,3)=9; a(2,4)=15;a(2,5)=17;a(2,6)=8;a(2,7)=11;a(2,8)=18;a(2,9)=14;a(2,10)=22; 已知a为正整数,且a^3+2a^2_12a+15表示某素数,求出这个素数a³+2a²-12a+15=a³+125+2a²-12a-110=(a+5)(a²-5a+25)+2(a²-6a-55)=(a+5)(a²-5a+25)+2(a+5)(a-11)=(a+5)(a²-5a+25+2a-22)=(a+5)(a²-3a+3)要使 谁知道1/(a-1)(a+1)+1/(a +1)(a+3)+1/(a+3)(a+5)+.+1/(a +9)(a+11)=?怎样做, 求matlab大神帮忙看一下程序,程序的目的是求解多元非线性方程组function P=myfun( x,a )F=a(1);T=a(2);Vx1=a(3);Vx2=a(4);Vy1=a(5);Vy2=a(6);Vz1=a(7);Vz2=a(8);x1=a(9);x2=a(10);y1=a(11);y2=a(12);z1=a(13);z2=a(14);r1=[x-x1,y-y1,z-z1];r (12a^5 - 6a - 10a^3) - (10a - 2a^5 - 14a^4) 是等于 14a^10 - 16a - 10a^3 + 14a^4 因式分解：a^12+a^9+a^6+a^3+1 已知a+1∕a=3,那么a•a+1∕a•a的值为 A.5 B.7 C.9 D.11 1=5a,2=8a,3=11a,4=14a,n=?a 5a、8a、11a、14a、17a、20a...第n个数为