急~~高中计算导数的小题,满意加分·
y=2xsin(3x+π/6)
y=xsin2x+cos3x
y=根号下是(x/1-x)
y=ln(sin2x/x)
孟令仁回答:
1.y'=2sin(3x+π/6)+6xcos(3x+π/6)
2.y'=sin2x+2xcos2x-3sinx
3.y'=1/2*根号((1-x)/x)/(1-x)=1/2*(x*(1-x))^(1/2)
4.y=lnsin2x-lnx;
y'=csc2x*cos2x*2-1/x
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急~~高中计算导数的小题,满意加分·
y=2xsin(3x+π/6)
y=xsin2x+cos3x
y=根号下是(x/1-x)
y=ln(sin2x/x)
孟令仁回答:
1.y'=2sin(3x+π/6)+6xcos(3x+π/6)
2.y'=sin2x+2xcos2x-3sinx
3.y'=1/2*根号((1-x)/x)/(1-x)=1/2*(x*(1-x))^(1/2)
4.y=lnsin2x-lnx;
y'=csc2x*cos2x*2-1/x