问题
单项选择题
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)=0
B.(x+1)+2(y+2)+3(z+3)=0
C.(x-1)+2(y-2)+3(z-3)=0
D.(x+1)+2(y+2)-(z+3)=0
答案
参考答案:C
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)=0
B.(x+1)+2(y+2)+3(z+3)=0
C.(x-1)+2(y-2)+3(z-3)=0
D.(x+1)+2(y+2)-(z+3)=0
参考答案:C