Basics.

Geometry Level 5

The number of points with integral coordinates ( 2 a , a 1 ) (2a,a-1) that fall in the interior of the larger segment of the circle x 2 + y 2 = 25 x^{2}+y^{2}=25 cut of by the parabola x 2 + 4 y = 0 x^2+4y=0 , is

None 1 3 2

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