(2012年高考(辽宁文))已知命题p:x1,x2
R,(f(x2)
f(x1)(x2
x1)≥0,则
p是 ( )
A.x1,x2
R,(f(x2)
f(x1)(x2
x1)≤0
B.x1,x2
R,(f(x2)
f(x1)(x2
x1)≤0
C.x1,x2
R,(f(x2)
f(x1)(x2
x1)<0
D.x1,x2
R,(f(x2)
f(x1)(x2
x1)<0
(2012年高考(辽宁文))已知命题p:x1,x2
R,(f(x2)
f(x1)(x2
x1)≥0,则
p是 ( )
A.x1,x2
R,(f(x2)
f(x1)(x2
x1)≤0
B.x1,x2
R,(f(x2)
f(x1)(x2
x1)≤0
C.x1,x2
R,(f(x2)
f(x1)(x2
x1)<0
D.x1,x2
R,(f(x2)
f(x1)(x2
x1)<0