Thi Online - Viết phương trình mặt cầu có lời giả...

A $\left ( x-3 \right )^{2}+\left ( y-4 \right )^{2}+\left ( z \right )^{2}=5$

B $\left ( x-3 \right )^{2}+\left ( y-4 \right )^{2}+\left ( z \right )^{2}=25$

C $\left ( x-3 \right )^{2}+\left ( y-4 \right )^{2}=25$

D $\left ( x \right )^{2}+\left ( y \right )^{2}+\left ( z \right )^{2}=25$

A I(1;1;-4);R=3

B $I(\frac{1}{2};1;-4);R=\frac{-9}{2}$

C $I(\frac{-1}{2};1;4);R=9$

D $I\left ( \frac{1}{2} ;1;-4\right );R=\frac{9}{2}$

A $\left ( x-1 \right )^{2}+\left ( 2y-1 \right )^{2}+\left ( z-1 \right )^{2}=6$

B $\left ( x-1 \right )^{2}+\left ( y-1 \right )^{2}+\left ( z-1 \right )^{2}=6$

C $\left ( 2x-1 \right )^{2}+\left ( 2y-1 \right )^{2}+\left ( 2z+1 \right )^{2}=6$

D $\left ( x+y \right )^{2}=2xy-z^{2}+3-6x$

A $x^{2}+y^{2}+z^{2}=9$

B $x^{2}+y^{2}+z^{2}-6y=0$

C $x^{2}+y^{2}+z^{2}-6z=0$

D $x^{2}+y^{2}+z^{2}-6x=0$