20.24.55.83.[ ]

Formula: an = - 5N & # 179; + 43.5n & # 178; - 91.5n + 73
A1 = -5+43.5-91.5+73 = 20
A2 = -40+174-183+73 = 24
A3 = -135+391.5-274.5+73 = 55
A4 = -320+696-366+73 = 83
A5 = -625+1087.5-457.5+73 = 78

RELATED INFORMATIONS

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