1 2 -1 3 4 -2 6 -4 1的逆矩阵
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1、2、2、4、3、6、4、( )、(
1+2+3/6+1/4=
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
简算:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6
[2^4+1/4)(4^4+1/4)(6^4+1/4)(8^4+1/4)(10^4+1/4)】/[1^4+1/4)(3^4+1/4)(5^4+1/4)(7^4+1/4)(9^4+1/4)]
1,2,2,3,4,6,( )
(6)2(1)(2)(3)(4)
巧算:(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=====
简算:24×(1/2+1/3-1/4-1/6)
(1/2+1/3+1/4+1/6)*24
(-2/3)+(-1/6)+1/4-1/2
习题2.8 -2/3+(-1/6)-(-1/4)-1/2
-1/2+(-1/6)-(-1/4)-2/3
1,2,4,6,
2/1:3/1:4/1:6/1怎么得出等于6:4:3:2
1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少?