题目内容
A.2∈M,0∈M B.2M,0M
C.2∈M,0M D.2M,0∈M
A.2∈M,0∈M B.2?M,0?M
C.2∈M,0?M D.2?M,0∈M
A.2∈M，0∈M B.2M，0M
C.2∈M，0M D.2M，0∈M
M,0
M
M D.2
M,0∈M
M,0
M
M D.2
M,0∈M
M，0
M
M D.2
M，0∈M
（x＞0）．
在（0，+∞）上单调递增，求实数a的取值范围．
≥1在[0，+∞）上恒成立，求实数b的最大值．