Question

化简求值（a-1分之a方-1）＋（a方-a分之a-1）,其中a=（2+根号3）分之1

Answer 1

（a方-1）/（a-1）＋（a-1）/（a方-a）

=a+1+1/a

=a+1/a+1

=2+根号3+1/（2+根号3）+1

=2+根号3+2-根号3+1

=5