可利用数列知识求解.设a1=3,a2=6,a3=10,a4=15,.则a2-a1=3,a3-a2=4,a4-a3=5,.
可利用数列知识求解.设a1=3,a2=6,a3=10,a4=15,.则a2-a1=3,a3-a2=4,a4-a3=5,.
设a1,a2,a3,a4是4维向量,且a1可由,a2,a3,a4线性表示,则|a1,a2,a3,a4|=
设矩阵A=[a1.a2.a3.a4],其中a2.a3.a4线性无关,a1=2a3-3a4.向量b=a1+2a2+3a3+
设A=(a1,a2,a3,a4,a5),a1,a3,a5线性无关,a2=3a1-a3-a5,a4=2a1+a3+6a5,
已知R(a1,a2,a3)=3,R(a1,a2,a3,a4)=3,R(a2,a3,a4)=2.
等差数列中a1+a2+a3+a4+a5=3,a1*a1+a2*a2+a3*a3+a4*a4+a5*a5=12求a1-a2
设矩阵A=(a1,a2,a3,a4),其中a2,a3,a4线性无关,a1=2a2-a3,向量b=a1+a2+a3+a4,
设矩阵A=(a1,a2,a3,a4)其中a2,a3,a4线性无关,a1=2a2-a3,向量b=a1+a2+a3+a4,求
已知R(A1,A2,A3)=2,R(A2,A3,A4)=3 证明:A1能由A2,A3线性表示;A4不能由A1,A2,A3
a1+a2+a3+a4+.a100=?
等比数列,a1+a2+a3=6,a2+a3+a4=3,求a3+a4+a5+a6+a7+a8=?
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,