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①函数的零点所在的区间是(2,3);②曲线y=4x-x3在点(-1,-3)处的切...
①函数
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的零点所在的区间是(2,3);②曲线y=4x-x
3在点(-1,-3)处的切线方程是y=x-2;③将函数y=2
x+1的图象按向量a=(1,-1)平移后得到函数y=2
x+1的图象;④函数y=
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的定义域是(-
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,-1)∪(1,
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)⑤
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•
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>0是
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、
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的夹角为锐角的充要条件;以上命题正确的是
.(注:把你认为正确的命题的序号都填上)
考点分析:
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