(x-7)(x+3)+(x-1)(x+5)=4x
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已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
[(x+2)/(x+3)-(x+1)/(x+2)+(x+4)/(x+5)-(x+3)/(x+4)]/[(x的平方+7x+13)/(x的平方+8x+15)]
计算:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15)
解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x x x x 9 x x xx x 2 x 5 x x x 4x 3 x x x x 6 x xx x x x x x x x 26 x x x x x x x 7x 5 4 1 7 x 9 8 x这道题我用了很多办法都没有头绪,请帮忙的朋友把解题的思
因式分解(x+1)(x+3)(x+5)(x+7)-12
因式分解 (x+1)(x+3)(x+5)(x+7)+15
(x+1)(x+3)(x+5)(x+7)+15因式分解
(x-1)(x-3)(x-5)(x-7)-84因式分解
(x-7)(x+3)+(x-1)(x+5)=102
(x-1)(x-3)(x-5)(x-7)-9 因式分解