题目: 曲线(5y+2)3=(2x+1)5,在点处的切线方程是()。A.AB.BC.CD.D 答案: 参考答案:B解析:设曲线y=f(x),方程两边求导数,15(5y+2)2y'=10(2x+1)4,y'=[点评] 隐函数求切线方程,通过求导数得到斜率。
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题型:单项选择题 下列属于腐朽文化的是()①相面、算命、测字、看风水等②封建主义、资本主义腐朽思想③殖民文化、邪教文化、色情文化等④封建迷信、愚昧思想、庸俗文化A.①②B.③④C.②③D.①④ 查看答案