已知a1a2a3a4成等比数列,且a1=a2+36,a3=a4+4,求a1a2a3a4
已知a1,a2,a3,a4成等比数列,且a1=a2+36,a3=a4+4,求a1,a2,a3,a4.
(1) 已知a1,a2,a3,a4为等比数列,且a1=a2+36,a3=a4+4,求a1,a2,a3,a4.
设向量组b1=a1 b2=a1-a2 b3=a1-a2-a3 b4=a1-a2-a3-a4 且向量组a1a2a3a4线性
a1a2a3a4为n元向量且r(a1,a2,a3)=2r(a2,a3,a4)=3证明 a1能由[a2,a3]线性表出 a
求逆矩阵(A1A2A3A4不等于0)要具体过程谢谢了 (A1 ) ( A2 ) ( A3 ) ( A4 )
已知等比数列{an}满足2a1+a3=3a2.且a3+2是a2.a4的等差中项.求数列
a1a2a3a4三维列向量A=(a1,a2,2a3-a4+a2),B=(a3,a2,a1),C=(a1+2a2,2a2+
已知数列a1,a2,a3为等比数列,数列a2,a3,a4为等差数列,且a1+a4=16,a2+a3=12,求a1,a2,
已知数列a1,a2,a3为等差数列,数列a2,a3,a4为等比数列,且a1+a4=16,a2+a3=12,求a1,a2,
已知等比数列{An},a1=3,且4a1 2a2 a3成等差数列,则a3+a4+a5等于?
设{an}为等差数列,且公差d为正数,已知a2+a3+a4=15,又a2,a3-1,a4成等比数列,求a1和d?
设{An}为等差数列,且公差d为正数,已知a2+a3+a4=15,又a2,a3-1,a4成等比数列,求a1和d