Option 20 DHS 4.2

Option 20 DHS 4.2

№1.20. Build the surface and determine their type a) 4x2 + 5y2 - 10z2 = 60; b) 7y2 + z2 = 14x2.
№2.20. Write the equation and determine the type of surface obtained by rotating this line around the specified coordinate axis, make a picture: a) x2 + 2z = 4; Oz; b) x = 3; z = - 1; Oy.
№3.20. Build a body bounded by the specified surfaces: a) y = 4x; y = 0; x = 4; z = 0;
b) x2 + y2 + z2 = 9; x2 + z2 = y2; x ≥ 0; y ≥ 0; z ≥ 0.