(1)/(1+x)+(2)/(1+x^2)+(4)/(1+x^4)+(8)/(1+x^8)+…+(n)/(1+x^n)-(2n)/(1-x^2n)化简
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/13 18:04:47
(1)/(1+x)+(2)/(1+x^2)+(4)/(1+x^4)+(8)/(1+x^8)+…+(n)/(1+x^n)-(2n)/(1-x^2n)化简(1)/(1+x)+(2)/(1+x^2)+(4)
(1)/(1+x)+(2)/(1+x^2)+(4)/(1+x^4)+(8)/(1+x^8)+…+(n)/(1+x^n)-(2n)/(1-x^2n)化简
(1)/(1+x)+(2)/(1+x^2)+(4)/(1+x^4)+(8)/(1+x^8)+…+(n)/(1+x^n)-(2n)/(1-x^2n)
化简
(1)/(1+x)+(2)/(1+x^2)+(4)/(1+x^4)+(8)/(1+x^8)+…+(n)/(1+x^n)-(2n)/(1-x^2n)化简
1/(1+x)+2/(1+x^2)+4/(1+x^4)+8/(1+x^8)+…+n/(1+x^n)-2n/(1-x^2n)
=1/(1-x)+1/(1+x)+2/(1+x^2)+4/(1+x^4)+8/(1+x^8)+…+n/(1+x^n)-2n/(1-x^2n)-1/(1-x)
=(1+x+1-x)/(1-x^2)+2/(1+x^2)+4/(1+x^4)+8/(1+x^8)+…+n/(1+x^n)-2n/(1-x^2n)-1/(1-x)
=2/(1-x^2)+2/(1+x^2)+4/(1+x^4)+8/(1+x^8)+…+n/(1+x^n)-2n/(1-x^2n)-1/(1-x)
=4/(1-x^4)+4/(1+x^4)+8/(1+x^8)+…+n/(1+x^n)-2n/(1-x^2n)-1/(1-x)
=8/(1-x^8)+8/(1+x^8)+…+n/(1+x^n)-2n/(1-x^2n)-1/(1-x)
.
=2n/(1-x^2n)-2n/(1-x^2n)-1/(1-x)
=-1/(1-x)
=1/(x-1)
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
因式分解(x+x)-(x+x-1)-2
(x-1)^3(x+1)(x-2)/(x+4)
x(x+1)(x+2)(x+3)+1 (换元法)
计算 x(x+3)-(x-1)(x-2)
化简:x(2x+1)-x(x-3)
(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)
(x+1)(x+2)
x^2(1-x)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(x+1)(x+2)(x+3)(x+4)+1(x+1)(x-2)(x+3)(x-4)+25
计算:(x+2/x^2-2x-x-1/x^2-4x+4)×x/4-x
(x+2/x^2-2x-x-1/x^2-4x+4)/x-4/x因式分解
化简[(x+2)/(x²-2x)+(x-1)/(x²-4x+4)]除以(x-4)/x
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
(x-1/x+1 - x+1/x-3 )除 2/x²+2x+1