№1 Build surfaces and determine their type a) - 3x2 + 6y2 - z2 - 18 = 0; b) x2 - 2y = - z2.

№2 Write down the equation and determine the type of surface obtained by rotating this line around the specified coordinate axis, make a picture: a) 2y2 - 5z = 10; Oz b) y = 2; z is 6; Ox.

№3 Build a body bounded by the indicated surfaces: a) z = 3y2; x2 + y2 = 4; z = 0.