The solution set of the inequation \( e x+\pi y1 \) is (a) Half plane that contains the origin (...

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The solution set of the inequation \( e x+\pi y1 \) is
(a) Half plane that contains the origin
(b) Open half palne not containing the origin
(c) Whole \( x y \)-plane except the points lying on the line \( 3 x+y=5 \)
(d) Closed half plane contains origin
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