A circle of radius a with both coordinates of its centre positive, ... VIDEO
A circle of radius a with both coordinates of its centre positive, touches the axis of \( x \) and the straight line \( 3 y=4 x \). then its equation is
\( \mathrm{P} \)
(A) \( x^{2}+y^{2}-4 a x-2 y-4 a^{2}=0 \)
(B) \( x^{2}+y^{2}-4 a x-2 a y+4 a^{2}=0 \)
W
(C) \( x^{2}+y^{2}+4 a x+2 a y-4 a^{2}=0 \)
(D) none of these
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