Question

计算：(1-

1

x+1

)÷

x

x2-1

．

Answer 1

分析：首先通分，然后计算化简即可求解．

解答：解：(1-

1

x+1

)÷

x

x2-1

=

x+1-1

x+1

×

(x-1)(x+1)

x

=x-1．

点评：此题主要考查了分式的混合运算，解题的关键是分式的通分、约分化简．