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求下列函数的导数 .y=ln(cos(10-3x²))
人气:387 ℃ 时间:2019-08-07 15:03:53
解答
y'=[cos(10-3x^2)]'/cos(10-3x^2)
=-sin(10-3x^2)*(10-3x^2)'/cos(10-3x^2)
=-sin(10-3x^2)*(-6x)/cos(10-3x^2)
=6xtan(10-3x^2)
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