(1)x-1/7

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(1)x-1/7(1)x-1/7(1)x-1/7(1)x-1/7-1/7-5/3=-(3+35)/21=-38/21x>-38/21(2)x+1/65/12

(1)x-1/7
(1)x-1/7

(1)x-1/7
(1)x-1/7-1/7 - 5/3=-(3+35)/21=-38/21 x>-38/21 (2)x+1/65/12

解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 已知x除以(x*x-x+1)=7,求x*x除以(x*x*x*x+x*x+1)的值 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- EXCEL两表间同时满足两个条件数据引用如题:表1为原始数据表1 2 3 4 5 6 7 8 9 10.A X X X X X X X X X XB X X X X X X X X X XC X X X X X X X X X XD X X X X X X X X X X .表2(A列) (B列) (C列)A 1A 3B 8B 5C 2D 3...... (3x^2+9x+7)/(x+1)-(2x^2-4x+3)/(x-1)-(x^3+x+1)/(x^2-1)是不是错了? 1 6x^3+11x^2-7x-152 (x^2+1)^2-x^2+x(x-2)(x^2+x+1) 1 6x^3+11x^2-7x-152 (x^2+1)^2-x^2+x(x-2)(x^2+x+1) 1 6x^3+11x^2-7x-152 (x^2+1)^2-x^2+x(x-2)(x^2+x+1) x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, 3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5 (1)方法 (8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3x+2x³-3) (3x²)³-7x³[x³-x(4x²+1)] (3x-2)(x+5)-7x(x的2次方-3x+1) (3x-2)(x+5)-7x(x的平方-3x+1) (x+1)+(x+4)+(x+7)+….+(x+28)=185,求x