-The general formula of 1 / 3,1 / 8, - 1 / 15,1 / 24

-The general formula of 1 / 3,1 / 8, - 1 / 15,1 / 24


The general formula is as follows:
An=(-1)^n/(n²+2n)



Write the general formula of 3,0,3,0


3 (1 + (- 1) n power) / 2
N is an integer greater than or equal to 0



The general formula of 3,9,816561
two
General term formula


an=3^(2^(n-1))



2/3,2,6,18,… General term formula


It's obviously an equal ratio sequence,
a1=2/3
q=2÷2/3=3
So an = 2 / 3 * 3 ^ (n-1)
That is, an = 2 * 3 ^ (n-2)

Elden Ring Premiere

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