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求导:y=ln(x+√(a^2+x^2))
i need process and detailed steps if necessary.
人气:268 ℃ 时间:2019-10-31 00:56:12
解答
y'=[1/(x+√(a^2+x^2))]*[x+√(a^2+x^2)]'
=[1/(x+√(a^2+x^2))]*[1+2x/2√(a^2+x^2)]
=[1/(x+√(a^2+x^2))]*[(√(a^2+x^2)+x)/√(a^2+x^2)]
=1/√(a^2+x^2)
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