(x-1)/x -(1-x)/(x+1)=(5x-5)/(2x+2) x等于多少有没有老师啊、?
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x*x*x*x+2008x*x+2007x+2008(提示:x*x*x-1=(x-1)*(x*x+x+1))
[x(x+1)+x平方(x-1)]+(-3x)
跪求1到6年级语文书(人民教育出版社)上的日积月累以及古诗词格式:一年级上下册古诗词:X X X X X X X X X X 二年级上下册古诗词:X X X X X X X X X X 三年级上下册古诗词:X X X X X X X X X X .(
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
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
请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360
35道.符号^代表平方.读起来就是(X的平方).1,x^-x-202,x^-9x+203,x^-9x-204,x^+9x+205,x^-18x+326,x^+14x-317,x^+18x+328,x^+14x-329,x^+19x+4810,x^+47x-4811,x^+13x-4812,x^+2x-4813,x^+26x+4814,x^-22x-4815,x^+17x+7216,x^+21x-10017,x^-x-7218,x
x/x+(1-x)/x-1/x
已知x除以(x*x-x+1)=7,求x*x除以(x*x*x*x+x*x+1)的值
x(x+1)-(x-12)(x+12)
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计算 x(x+3)-(x-1)(x-2)
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lim( x→∞)(1+x / x)^3x