作业帮计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+……1/(x+1998)(x+1999)
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/20 23:16:29
x){nu
+4*
5
40r@ cMG
ˀ"oii -5m`~
\o dBPx:6C{:*@ J@,M2³Ά'>u=Ȇ 5m -0gY" A<]\g
8 z {z@.|m]}D .
计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+……1/(x+1998)(x+1999)
计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+……1/(x+1998)(x+1999)
计算1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+……1/(x+1998)(x+1999)
1/x(x+1)=1/x-1/(x+1) 同理1/（x+n)(x+n+1)=1/(x+n)-1/(x+n+1) 所以上公式=1/x-1/(x+1)+1/(x+1)-1/（x+2)+……+1/（x+1998)-1/(x+1999)=1/x-1/(x+1999)=1999/x(x+1999)
1/x(x+1)+1/(x+1)(x+2)=1/x-1/(x+1)+1/(x+1)-1/(x+2) 同理 所以，上式等于=1/x-1/(x+1999)=1999/x(x+1999)
计算：x(x^2+x-1)-(x^2-x+1)
计算【x-1】【x²+x+1】
计算:x/(1-x)-1/(x-3)
计算:|3-x|+|x-1|(x>5)
计算：x/(x-1)-(x+3)/(x^-1)*(x^2+2x+1)/(x+3)
计算下列各题:(1+x)(x-1/x²+x-1-x/x³-x)
计算:[(x^2 - 4)/(x^2 - x - 6) + (x+2)/(x-3)] / (x+1)/(x-3)
计算：1-2x+x^2/x-x^3*xy+x^2y/x-x^2
计算：(x-1)(x-1)-(x+1)(x+1)
计算1/x(x+1).+1/(x+199)(x+200)
计算x平方+x+1+1-x分之x立方
计算 （x-1/x)/(x+1/x-2)
初二计算：x²/x-1+x/1-x
计算：x²+x+1-(x³)/(x-1)
计算：(3/x)+(x/x²-1)-(4/1-x)
计算：x(x-1)(x+1)(x+2)-24
计算：( x-1)/x÷[x-(1/x)]
Lim(x>1) x-1/x^2+x-2.计算