20.24.55.83.[ ]

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/14 09:37:43
20.24.55.83.[]20.24.55.83.[]20.24.55.83.[]公式:An=-5n³+43.5n²-91.5n+73A1=-5+43.5-91.5+73=20A

20.24.55.83.[ ]
20.24.55.83.[ ]

20.24.55.83.[ ]
公式:An=-5n³+43.5n²-91.5n+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

20.24.55.83.[ ]