A1(1) A2(1)
三个正整数a1,a2,a3,且a1+a2+a3=a1×a2×a3,a1≥1,a2≥2,a3≥3,求a1,a2,)
A1 10-1 A2 A3=IF(A2="","TODAY()-A1+1",A2-A1),today()-A1+1怎么不
正数a1,a2,a3两两不等,且a2-a1=a3-a2,求证1\(√a2+√a1)+1\(√a2+√a3)=2\(√a1
设a1不等于a2(a1+b1)(a1+b2)=(a2+b1)+(a2+b2)=1证明(a1+b1)(a2+b1)=(a1
计算行列式|111...1,b1 a1 a1...a1,b1 b2 a2...a2,.b1 b2 b3 ...an|
设a1,a2,...,an都是正数,证明不等式(a1+a2+...+an)[1/(a1)+1/(a2)+...+1/(a
1.计算阶行列式1+a1 a2 a3 .ana1 1+a2 a3 .ana1 a2 1+a3.an....a1 a2 a
设a1,a2,b1,b2都是实数,a1不等于a2,满足(a1+b1)(a1+b2)=(a2+b1)(a2+b2)=1,求
a1=1,a2=9,a3=25.求a1+a2+...+a100
概率论 证P(A)>=P(A1)+P(A2)-1,已知A1交A2属于A
等差数列公式Sn = a1+a2+...+anSn = a1+(a1+d)+(a1+d+d)+...+[a1+(n-1)
线性代数 、设 a1,a2,a3均为三维列向量,且|a1 a2 a3|=1 ,那么|a3 a2 a1-2a2|=