参考答案:
1-6.BCDACB 7-12.ADBBDD 13.25 14.1008 15. 16.a<-1
17.或
18.2x-y-2=0或2x+y-2=0
19.(1)A=60°(2)
20.(1)(2)
21.(1),f(x)的减区间为(-1,1) (2)
22.(1)(2)