№1.25. Build the surface and determine their type a) x2 - 6y2 + z2 - 12 = 0; b) x - 3z2 = 9y2.
№2.25. Write the equation and determine the type of surface obtained by rotating this line around the specified coordinate axis, draw a picture. a) 3x2 - 8y2 = 288; 0x; b) x = 5; z = - 3; Oy.
№3.25. Build a body bounded by the specified surfaces: a) y = 2x; x = 4; y = 0; ...; z = 0.
b) x + y = 2; ....; z = 12y; z = 0; x = 0.