A1 10-1 A2 A3=IF(A2="","TODAY()-A1+1",A2-A1),today()-A1+1怎么不显示数值,而显示公式呢

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A1 10-1 A2 A3=IF(A2=
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A1 10-1 A2 A3=IF(A2="","TODAY()-A1+1",A2-A1),today()-A1+1怎么不显示数值,而显示公式呢
A1 10-1 A2 A3=IF(A2="","TODAY()-A1+1",A2-A1),today()-A1+1怎么不显示数值,而显示公式呢

A1 10-1 A2 A3=IF(A2="","TODAY()-A1+1",A2-A1),today()-A1+1怎么不显示数值,而显示公式呢
=IF(A2="",TODAY()-A1+1,A2-A1)

A1 10-1 A2 A3=IF(A2=,TODAY()-A1+1,A2-A1),today()-A1+1怎么不显示数值,而显示公式呢 设a1,a2,a3为正数,求证a1*a2/a3+a2*a3/a1+a3*a1/a2>=a1+a2+a3 三个正整数a1,a2,a3,且a1+a2+a3=a1×a2×a3,a1≥1,a2≥2,a3≥3,求a1,a2,) 设|A|是三阶矩阵,A=(a1,a2,a3)则|A|=?A.|a1-a2,a2-a3,a3-a1| B.|a1-a2,a2-a3,a3-a1|C.|a1+2a2,a3,a1+a2| D.|a1-a3,a2+a3,a1+a2| a1+a2+a3=12,a2=? 求证a1a2a3>=(a1+a2-a3)(a1+a3-a2)(a2+a3-a1),a1…>=0 已知a1,a2,a3为正数,a1+a2+a3=1,求证:(a1+1/a1)(a2+1/a2)(a3+1/a3)>=1000/27 计算 n+1阶行列式,Dn+1=[x a1 a2 a3...an;a1 x a2 a3...an;a1 a2 x a3...an;............a1 a2 a3 a4 ...x] 为什么行列式|a3,a2,a1,b1+b2| =| a1 a2 a3 b1 | + | a3 a2 a1 b2|? 为什么(a0+a2)²-(a1+a3)² =(a0+a2+a1+a3)(a0+a2-a1-a3) 表格中有A1、A2、A3三个数值,如果A2>=1,且A3>=1,就将A2+A3,否则就取A1、A2、A3中的最大值,怎么写公式=IF(AND(A2>=1,A3>=1),A2+A3),=LARGE(A1:A3) 写不对, Mathematica怎么画不出d[3.3]的图?程序如下:Table[{M = Solve[(x - 8) (x - 5) (x - 6) == 0,x]; a1 = M[[1,1,2]]; a2 = M[[2,1,2]]; a3 = M[[3,1,2]]; {If[a2 < a3,{t = a2; a2 = a3; a3 = t}];If[a1 < a2,{t = a1; a1 = a2; a2 = t}];If[a2 < a3,{t = a2 设A=(a1,a2.a3)其中a1,a2.a3为三维向量,如果|A|= -1,则|a1,2a1+3a2+a3,-3a2|=? 五个实数-16,a1,a2,a3-1成等比实数那么a1+a2+a3= 设A=(a1,a2.a3)其中a1,a2.a3为三维向量,如果|A|= -1,则|a1,2a1+3a2+a3,-3a3|=? 设a1,a2,a3均为3维列向量,记矩阵A=(a1,a2,a3)B=(a1+a2+a3,a1+2a2+2a3,a1+3a2+4a3),如果|A|=1,那么|B|= 设a1,a2,a3均为3维列向量,A=(a1,a2,a3).B=(a1+a2+a3,a1+2a2+4a3,a1+3a2+9a3),|A|=1,则|B|=_____ 线代证明题证明:设有向量组a1,a2,a3,a4,若R(a1,a2,a3,a4)>R(a1,a2,a3)则必有R(a1,a2,a3,a4)=R(a1,a2,a3)+1