11.若集合{1,a,$\frac{b}{a}$}={0,a2,a+b},则a2015+b2016的值为( )
A. | 0 | B. | 1 | C. | -1 | D. | ±1 |
10.已知函数f(x)=$\left\{\begin{array}{l}{-{x}^{2}+2x-1,x≥1}\\{{x}^{2}-1,x<1}\end{array}\right.$,则f[f(x)]<3的解集为( )
0 248734 248742 248748 248752 248758 248760 248764 248770 248772 248778 248784 248788 248790 248794 248800 248802 248808 248812 248814 248818 248820 248824 248826 248828 248829 248830 248832 248833 248834 248836 248838 248842 248844 248848 248850 248854 248860 248862 248868 248872 248874 248878 248884 248890 248892 248898 248902 248904 248910 248914 248920 248928 266669
A. | (-2,+∞) | B. | (-2,$\sqrt{2}+1$) | C. | (-∞,$\sqrt{2}+1$) | D. | (-$\sqrt{2}+1$,$\sqrt{2}+1$) |