r1 = 2r2
T2 = 2T1
a1 = 4пи^2*r1 / T1^2
a2 = 4пи^2*r2 / T2^2
a1 / a2 = (4пи^2*r1 / T1^2) / (4пи^2*r2 / T2^2) = r1*T2^2 / T1^2*r2
a1 / a2 = 2r2*(2T1)^2 / T1^2*r2 = 2r2*4T^2 / T1^2*r2 = 8
r1 = 2r2
T2 = 2T1
a1 = 4пи^2*r1 / T1^2
a2 = 4пи^2*r2 / T2^2
a1 / a2 = (4пи^2*r1 / T1^2) / (4пи^2*r2 / T2^2) = r1*T2^2 / T1^2*r2
a1 / a2 = 2r2*(2T1)^2 / T1^2*r2 = 2r2*4T^2 / T1^2*r2 = 8