求导,麻烦带步骤,
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求导,麻烦带步骤,
求导,麻烦带步骤,
求导,麻烦带步骤,
lny = lnx*sin(3x)
y'/y = (1/x)sin(3x) + lnxcos(3x)*3
= (1/x)sin(3x) + 3lnxcos(3x)
y' = [sin(3x)^lnx][(1/x)sin(3x) + 3lnxcos(3x)]
lny = lnx*sin(3x)
y'/y = (1/x)sin(3x) + lnxcos(3x)*3
= (1/x)sin(3x) + 3lnxcos(3x)
y' = [sin(3x)^lnx][(1/x)sin(3x) + 3lnxcos(3x)]