31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
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31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
=94/3*83/2-34/3*83/2*2-19/2*34/3
=1/6(94*83-34*83-34*83-19*34)
=1/6[83*(94-34)-34*(83+19)]
=1/6(83*60)-1/6(34*102)
=83*10-34*17=830-578=252
31*1/3*41 *1/2 -11*1/3*41*1/2*2-9*1/2*41*1/3
=31/6*41-2/6*41-1/6*41
=41*(31/6-2/6-1/6)
=574/3
没连起来??
(31+1/3)*(41+1/2)-(11+1/3)*(41+1/2)*2-(9+1/2)*(11+1/3)
31 1/3*41 1/2 -11 1/3*41 1/2*2-9 1/2*11 1/3
简便运算:31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
简便运算:31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
31又1/3×41又1/2-11又1/3×41又1/2×2-9.5×11又1/3
有理数的加减乘除混合运算 ⑴31又1/3 × 41又1/2 - 11又1/3 × 41又1/2 × 2 - 9.5 × 11又1/3
计算 (1/11+1/21+1/31+1/41)*(1/21+1/31+1/41+1/51)-(1/11+1/21+1/31+1/41+1/51)*(1/21+1/31+1/41)
(1/11+1/21+1/31+1/41)*(1/21+1/31+1/41+1/51)-(1/11+1/21+1/31+1/41+1/51)*(1/21+1/31+1/41)老师要方法啊.
(1/11+1/21+1/31++1/41)*(1/21+1/31++1/41+1/51)-(1/11+1/21+1/31+1/41+1/51)*(1/21+1/31+1/41)=?
31又3/1乘以41又2/1减11又3/1乘以41又2/1乘以2 减9又2/1乘以11又3/1
(1/11+1/21+1/31+1/41)*(1/21+1/31+1/41+1/51)-(1/11+1/21+1/31+1/41+/51)*(1/21+1/31+1/41)
31又3分之1×41又2分之1减11又3分之1×41又2分之1×2减9.5×11又3分之1的简算
1/11-11/31+2/11-12/31+3/11-13/31+.+10/1-20/31=?简算
1/11-11/31+2/11-12/31+3/11-13/31+.+10/1-20/31=?
求特征向量和特征根1 1/3 4 3 33 1 6 4 41/4 1/6 1 1/3 1/31/3 1/4 3 1 11/3 1/4 2 1 1 五乘五的矩阵
7的2014次方是多少急,求快还有31又3分之1×41又2分之1-11又3分之1×41又2分之1×2-9.5×11又3分之一
1/11-11/31+2/11-12/31+3/11-13/31+.+10/11-20/31=
(1/11+1/20+1/31+1/40)*(1/21+1/30+1/41+1/50)-(1/11+1/21+1/31+1/41+1/51)*(1/21+1/31+1/41)=?