№1 Build surfaces and determine their type a) 4x2 + 6y2 - 24z2 = 96; b) y2 + 8z2 = 20x2.

№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) x2 + 3z2 = 9; Oz b) x = 4; z is 6; Oy.

№3 Build a body bounded by the indicated surfaces: a) y = x; y = 0; x is 1; ...; z = 0.
b) x2 + y2 + z2 = 4; x2 + y2 = z2; x ≥ 0; z ≥ 0.