Вариант 16 ИДЗ 4.2

№1.16. Build the surface and determine their type a) - 7x2 + 14y2 - z2 + 21 = 0; b) y2 + 2z2 = 6x2.
No. 2.16. Write the equation and determine the type of surface obtained by rotating this line around the specified axis of coordinates, make a picture: a) 2x2 = z; Oz; b) x2 + 4z2 = 4; Ox.
No. 3.16. Build a body bounded by the indicated surfaces: a) y2 + 4z2 = 8; 16x2 - 49y2 = 784; z ≥ 0.
b) x = 1; y = 3; x + 5y + 10z = 20; x = 0; y = 0; z ≥ 0.