(1)计算:8+(2010?3)0?(12)?1.(2)解方程:xx?1?2x2?1=1

(1)计算:8+(2010?3)0?(12)?1.(2)解方程:xx?1?2x2?1=1.
2025-12-16 23:22:15
推荐回答(1个)
回答1:

(1)

8
+(2010?
3
)0?(
1
2
)?1=2
2
+1-2=2
2
-1;
 
(2)方程两边都乘以(x-1)(x+1),得
x(x+1)-2=(x-1)(x+1),
解得x=1.
检验:当x=1时,(x-1)(x+1)=0,
则x=1是原方程的增根,
所以原方程无解.