高等数学求dy
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时间:2026-03-20 20:42:11
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lny=lnx/sin(1/x)
y'/y=[sin(1/x)/x-lnxcos(1/x)*(-1/x^2)]/sin^2(1/x)
y'=y*[sin(1/x)/x-lnxcos(1/x)*(-1/x^2)]/sin^2(1/x)
lny=lnx/sin(1/x)
y'/y=[sin(1/x)/x-lnxcos(1/x)*(-1/x^2)]/sin^2(1/x)
y'=y*[sin(1/x)/x-lnxcos(1/x)*(-1/x^2)]/sin^2(1/x)