0 53765 53773 53779 53783 53789 53791 53795 53801 53803 53809 53815 53819 53821 53825 53831 53833 53839 53843 53845 53849 53851 53855 53857 53859 53860 53861 53863 53864 53865 53867 53869 53873 53875 53879 53881 53885 53891 53893 53899 53903 53905 53909 53915 53921 53923 53929 53933 53935 53941 53945 53951 53959 266669
)≤a+b-1.
,求函数y=x(1-3x)的最大值.
+
=2(x＞0,y＞0),则xy的最小值是__________.
,则函数y=4x-2+
的最大值为__________.
-1)(
-1)(
-1),且a+b+c=1(其中a,b,c∈R+),则M的取值范围是…( )
)
,1)
+
+
,Q=
(lga+lgb),R=lg(
),则( )