1;0,1,3,8,21,(a.42 b.29 c.55 d.632;7,9,40,74,1526,(a.1600 b.
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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.738 c.1029 d.12254;
![1;0,1,3,8,21,(a.42 b.29 c.55 d.632;7,9,40,74,1526,(a.1600 b.](/uploads/image/z/17206571-11-1.jpg?t=1%EF%BC%9B0%2C1%2C3%2C8%2C21%2C%EF%BC%88a.42+b.29+c.55+d.632%EF%BC%9B7%2C9%2C40%2C74%2C1526%2C%28a.1600+b.)
0,1,3,8,21,(55a.42 b.29 c.55 d.63差为1,2,5,13,34从第二位开始,乘2后加上前面所有的数的和就是后一数.所以本题是C,557,9,40,74,1526,(a.1600 b.5436 c.1640 d.30527^2-9=409^2-7=7440^2-74=152674^2-40=5436所以选B 54367,11,17,23,(31a.36 b.35 c.33 d.31选D ,31都是质数.5,10,26,65,(170a.122 b.145 c.170 d.1975=2^2+110=3^2+126=5^2+165=8^2+1170=13^2+12,3,5,8,13前两个相加为后一个数.所以选C 1701,8,125,343,(729a.729 b.648 c.512 d.456为1,2,5,7,9的三次方,怀疑8为27误.1,2,9,64,(625a.256 b.625 c.362 d.530为1的零次方,2的一次方,3的二次方,4的3次方,5的4次方,选6252,30,130,350,(BA729 B738 C1029 D12252=1^3+130=3^3+3130=5^3+5350=7^3+7738=9^3+9"
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3a+b=11 3d+b=11 3b+a=9 a+2b+d=8 a+2c+b=21 a+2b+d=8 b+2d+a=7
A B C D × 9 ___________________ D C B A (1) A = ( )(2) B = (
已知a、b、c、d满足方程组3a+b+c+d=1a+3b+c+d=9a+b+3c+d=9a+b+c+3d=5
已知a>b>c>d,求证1/a-b+1/b-c+1/c-a>=9/a-d
数学解方程,复杂啊-12=3a+2b+c ①0=-a+b-c+d②0=27a+9b+3c+d③1=a+b+c+d④帮忙解
a,b,c,d>0 证(a/(b+2c+3d))+(b/(c+2d+3a))+(c/d+2a+3b))+(d/(a+2b
设a,b,c满足ab+bc+cd+da=1,求证:a^3/(b+c+d)+b^3/(a+c+d)+c^3/(a+b+d)
A+B+C+D=10 A+B=3 B+D=7 A+A=2 C+1=D谁能算出这个题?
求齐次线性方程组 (1)A-8B+10C+2D=0 2A+4B+5C-D=0 3A+8B+6C-2D=0 (2) A+B
求齐次线性 (1)A-8B+10C+2D=0 2A+4B+5C-D=0 3A+8B+6C-2D=0 (2) A+B=5
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
如果|a-2b|+(b-3c)=0,那么a=b-2c=? 选择:A:6c.B:7c.C:8c.D:9c.