2010016102 | math4u.vsb.cz

SubArea:

Level:

Project ID:

2010016102

Source Problem:

Accepted:

0

Clonable:

1

Easy:

0

If the equation

x^{2} + y^{2} + z^{2} + 2 x - 8 y + z + 18 = 0

is the equation of a sphere, find its center

S

and radius

r

.

It is not a sphere equation.

S = [- 1; 4; - \frac{1}{2}]

,

r = \frac{3}{4}

S = [1; - 4; \frac{1}{2}]

,

r = \frac{\sqrt{3}}{2}

S = [- 1; 4; - \frac{1}{2}]

,

r = \frac{\sqrt{3}}{2}

S = [1; - 4; \frac{1}{2}]

,

r = \frac{3}{4}