Question

初二分式练习题及答案

Answer 1

(1) 

=(x-1)/(x^2-1)+1/(x^2-1)-(x+1)/(x^2-1) 

=[x-1+1-(x+1)]/(x^2-1) 

=-1/(x^2-1) 

(2) 

=√(8x/16)-√(2x/16) 

=1/4[2√(2x)-√(2x)] 

=1/4√(2x) 

(3)

=(√2-1)/[(√2+1)(√2-1)]+(√3-√2)/[(√3+√2)(√3-√2)]+
(2-√3)/[(2+√3)(2-√3)]+...

=(√2-1)+(√3-√2)+(2-√3)+...+(10-√99)

=-1+10

=9