Respuesta :

Solution

For this case we have the following numbers:

10, 8, 6,4,2,....

So then we can write the general term on this way:

an= 10 -2(n-1), n=1,2,3,4,...

And the 15th term would be:

a15 = 10 -2*14 = 10 -28 = -18

And the solution would be:

D ) -18

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