分式化简:(1)1/x-1/(X+1) (2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x+1000)
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分式化简:(1)1/x-1/(X+1)(2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x+1000)分式化简:(1)1/x-1/(X+1)(2)1/x(x+1)+1/(X
分式化简:(1)1/x-1/(X+1) (2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x+1000)
分式化简:(1)1/x-1/(X+1) (2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x+1000)
分式化简:(1)1/x-1/(X+1) (2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x+1000)
(1)1/x-1/(x+1)=(x+1-x)/(x(x+1))=1/(x(x+1))
(2)1/x(x+1)+1/(X+1)(x+2)+...+1/(x+999)(x+1000)
=1/x-1/(x+1)+1/(x+1)-1/(x+2)+……+1/(x+999)-1/(x+1000)
=1/x-1/(x+1000)
=(x+1000-x)/(x(x+1000))
=1000/(x(x+1000))
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