曲线y=xlnx的平行于直线x-y+1=0的切线方程是() A、y=xB、y=(lnx-1)(x-1)C、y=x-1D、y=-(x-1)
曲线y=xlnx的平行于直线x-y+1=0的切线方程是()
A、y=x
B、y=(lnx-1)(x-1)
C、y=x-1
D、y=-(x-1)
相关考题:
曲面z=y+lnx/z在点(1,1,1)处的法线方程是:()A、(x-1)/1=(y-1)/1=(z-1)/-1B、(x-1)/1=(y-1)/1=(z-1)/-2C、(x-1)/1=(y-1)/-1=(z-1)/-2D、x+y-z=1
单选题曲面x2+2y2+3z2=21在点(1,-2,2)的法线方程为( )。A(x-1)/1=(y+2)/4=(z-2)/6B(x-1)/1=(y+2)/(-4)=(z-2)/6C(x-1)/6=(y+2)/(-4)=(z-2)/1D(x-1)/1=(y+2)/6=(z-2)/(-4)
单选题球面x2+y2+z2=14在点(1,2,3)处的切平面方程是().A(x-1)+2(y-2)-(z-3)=0B(x+1)+2(y+2)+3(z+3)=0C(x-1)+2(y-2)+3(z-3)=0D(x+1)+2(y+2)-(z+3)=0
单选题曲面z-ez+2xy=3在点(1,2,0)处的切平面方程为( )。A4(x+1)+2(y-2)=0B4(x-1)+2(y-2)=0C4(x-1)-2(y-2)=0D4(x-1)+2(y+2)=0
单选题If x and y are positive numbers greater than 1, and wx/y+w =1 then w= ______.A(x-1)/(y-1)By/(x-1)C(x+1)/yD(x-y)/(x+y)Ey/(x+1)
单选题曲面z-ez+2xy=3在点(1,2,0)处的切平面方程为( )。A3(x-1)+2(y-2)=0B4(x-1)+2(y-2)=0C3(x-1)+(y-2)=0D4(x-1)+(y-2)=0
单选题曲面z-ez+2xy=3在点(1,2,0)处的切平面方程为( )。A4(x-1)+2(y-2)=0B-4(x-1)+2(y-2)=0C4(x-1)-2(y-2)=0D-4(x-1)-2(y-2)=0
单选题曲线y=y(x)经过原点且在原点处的切线与直线2x+y=6平行,而y=y(x)满足方程y″-2y′+5y=0,则此曲线的方程为( )。Ay=excos2xBy=-excos2xCy=exsin2xDy=-exsin2x
单选题曲线y=y(x)经过原点且在原点处的切线与直线2x+y=6平行,而y=y(x)满足方程y″-2y′+5y=0,则此曲线的方程为( )。Ay=exsin2xBy=-exsin2xCy=exsinxDy=-exsinx