№1 Build surfaces and determine their type a) 4x2 - 6y2 + 3z2 = 0; b) 4x2 - y2 - 3z2 = 12.

№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 = - 5y; Oy; b) 2x2 + 3z = 6; Ox.

№3 Build a body limited by the indicated surfaces:
a) y = 4x; y = 0; x is 1; z is xy; z = 0.