＞
C.a+c＞b+d D.a-c＞b-d
+
+…+
+
≥x1+x2+…+xn.
.
与
的大小关系是_________.
函数f(x)对一切实数x,y均有f(x+y)-f(y)=(x+2y+1)x成立,且f(1)=0.
0 53788 53796 53802 53806 53812 53814 53818 53824 53826 53832 53838 53842 53844 53848 53854 53856 53862 53866 53868 53872 53874 53878 53880 53882 53883 53884 53886 53887 53888 53890 53892 53896 53898 53902 53904 53908 53914 53916 53922 53926 53928 53932 53938 53944 53946 53952 53956 53958 53964 53968 53974 53982 266669
(1)求f(0);
(2)求f(x);
(3)不等式f(x)＞ax-5当0＜x＜2时恒成立,求a的取值范围.
)2+(y+
)2的最小值为多少?
)2+(b+
)2≥
.
-1)(
-1)(
-1)≥8.