Mathematics, 04.12.2020 05:00, bunnybuge4

Write an explicit formula for each sequence Arithmetic sequences : an=a1+d(n-1)
1) 2, 4, 6, 8
2) 15 , 12, 9 , 6
Geometric sequences : gn=g1 *r (n-1 )
3) 5, 10 , 20, 40
4) 1, -2 , 4 , -8

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Write an explicit formula for each sequence Arithmetic sequences : an=a1+d(n-1)
1) 2, 4, 6,...