№1.23. Build the surface and determine their view of a) 4x2 + 3y2 = 12x; b) 3x2 - 4y2 - 2z2 + 12 = 0.
№2.23. Write the equation and determine the type of the surface obtained by the rotation of the line around the specified axes, making pattern. a) 15y2 - x2 = 6; 0y; b) x = 5; z = 2; Oy.
№3.23. Build a body bounded by said surfaces: a) y = 3x; x = 3; y = 0; ...; z = 0.
b) ...; z = 5 - x2 - y2.

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