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

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