作业帮计算1/x(x+1)+1/(x+1)(x+2)+...+1/(x+1998)(x+1999)当x=1时,该代数式的值
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/16 00:03:03
计算1/x(x+1)+1/(x+1)(x+2)+...+1/(x+1998)(x+1999)当x=1时,该代数式的值
计算1/x(x+1)+1/(x+1)(x+2)+...+1/(x+1998)(x+1999)当x=1时,该代数式的值
计算1/x(x+1)+1/(x+1)(x+2)+...+1/(x+1998)(x+1999)当x=1时,该代数式的值
1/x(x+1)+1/(x+1)(x+2)+...+1/(x+1998)(x+1999)
=1/1×2+1/2×3+1/3×4+……+1/1999×2000
=1-1/2+1/2-1/3+1/3-1/4+……+1/1999-1/2000
=1-1/2000
=1999/2000
1/x(x+1)+1/(x+1)(x+2)+...+1/(x+1998)(x+1999)
=1/x-1/(x+1)+1/(x+1)-1/(x+2)+……+1/(x+1998)-1/(x+1999)
=1/x-1/(x+1999)
当x=1时
原式=1-1/2000=1999/2000
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