题目内容
命题:“
x∈R,cos2x≤cos2x”的否定为
[ ]
A.
x∈R,cos2x>cos2x
B.
x∈R,cos2x>cos2x
C.
x∈R,cos2x<cos2x
D.
x∈R,cos2x≤cos2x
答案:B
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题目内容
命题:“
x∈R,cos2x≤cos2x”的否定为
A.
x∈R,cos2x>cos2x
B.
x∈R,cos2x>cos2x
C.
x∈R,cos2x<cos2x
D.
x∈R,cos2x≤cos2x