3 11 13 29 31 ( )A.52 B.53 C.54 D.55提示答案选的是53.
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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
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
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.+2008a+2009a-2010a-2011a如何合并同类项?
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
5a-a*a+[5a*a-3a]-6*[a*a-a]
请问,这17道关于一元一次方程的题目我做对了吗?(1)A-5=6A-5+5=6+5A=11(2)0.3A=45A=13.5(3)5A+4=05A=4A=0.8(4)5A-2A=93A=9A=3(5)-3A+0.5A=10-2.5A=10A=4(6)6A-4=4A-56A-4A=-5+42A=-1A=0.5(7)2A+3A+4A=189A=18A=2(8)13A-15A+A=-3-3A=-3A=1(9)
若2a-3>a-6,11a-5
已知代数式(7a/3)-(11a+33/6)的值小于代数式(-3a-1/5)-(13-a/2)的值,化简|1-|1+a||
已知a^2-4a+1=0,求[2a^5-7a^4+a^3-11a^2+7a]/[3a^2+3]
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,
已知:a+2a+3a+4a+.+10a=5.5那么:a=( )在数列2,5,11,a,47,...中,a=( )
9a*a*a*a-()=(3a*a+5c)(3a*a-)
a-2a+3a-4a+5a-6a+...+99a-100a
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
(a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)=
(a+3a+5a+.+2009a)-(2a+4a+6a+.2008a)