One of them is described in [12] and consists in choosing a sufficiently large \(\alpha >4\) and in computing \(c_k^{(3)} \), for \(k=1,2,3,4\).

Daga cikinsu, yawan kudaden kayayyakin da kasar Sin ta shigo da su daga kasashen Afirka ya kai dalar Amurka kimanin biliyan 21.1.
