5,10,26,65,145()A 197 B 226 C 257 D 290

a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a= 5,10,26,65,145()A 197 B 226 C 257 D 290 1；0,1,3,8,21,（a.42 b.29 c.55 d.632；7,9,40,74,1526,(a.1600 b.5436 c.1640 d.30523;7,11,17,23,(a.36 b.35 c.33 d.314;5,10,26,65,(a.122 b.145 c.170 d.1975;1,8,125,343,(a.729 b.648 c.512 d.4566;1,2,9,64,(a.256 b.625 c.362 d.5307;2,30,130,350,(a.729 b 23-a-｛10a-[(5a-15)-(4-6a)]｝ 合并同类项：a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a+12a+……+2008a+2009a-2010a-2011a 行测题,1.2,3,2,6,3,8,6,( ) A:3 B:4 C:9 D:82.23,2,21,6,19,12,17,( ) A:13 B:20 C:15 D:183.-26,-6,2,4,6,( ) A:13 B:14 C:12 D:114.0,1,1,2,4,7,13,( ) A:23 B:25 C:22 D:245.5,10,26,65,145,( ) A:257 B:226 C:197 D:2906.0,1,2,9,( ) A:36 B:730 C:27 D:11需 a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a.+2008a+2009a-2010a-2011a如何合并同类项? 已知2a^2-3a+4=6.求-4a^2+6a-31、已知2a^2-3a+4=6.（1）求-4a^2+6a-3（2）8a^2-12a+52、已知2x+y=10xy求:（4x+xy+2y）÷ （2x-4xy+y)3、若(a-b)÷(a+b)=4求:[(2a-2b)÷(a+b)]-[(4a+4b)÷(3a-3b)]4、3a-5b+19=0 a+8b-1=o(1)-12a-9b(2)4a-26b(3) (4 (-a^4)^5-(-a²×a³)^4+(-a²)^10+a^4(-a²)^5×(-a²)³ (-a^4)^5-(-a^2*a^3)^4+(-a^2)^10+a^4(-a ^2)^5*(-a^2)^3 3a(2a-5)+2a(1-3a)=26则A等于多少 通分 3个式子a²-25/a²+10a+25 a+5/a²-5a a²+5a/5-a 36-a^2/a^2+10a+25÷6-a/2a+10×a-5/a^2+6a其中a=根号2 问几道电路作业5、F=A +BD+CDE+ D=（ ） (A) A (B) A+D (C) D (D) A+BD逻辑函数F=A⊕(A⊕B)(A) B (B) A (C)A⊕B8、下列数中,最大的数是 （ ）.(A) ( 65 ) 8 (B) ( 111010 ) 2 (C) ( 57 ) 10 (D) ( 3D ) 16 -2a²-2(5a²+2a)+(3a²-10a)要过程 -2a平方-2(5a平方+2a) +(3a平方-10a)计算 (3a+5)-{9a-[6a+2-(12a-10)+2(a+1)]} （3a+5)-{9a-[6a+2-(12a-10)+2(a+1)]