13. The third term in an arithmetic sequence is 10 and the fifth term is 26. If the first term is, which is an equation for the nth term of this sequence?

Question

Mathematics

Merritt

16 July, 23:15

13. The third term in an arithmetic sequence is 10 and the fifth term is 26. If the first term is, which is an equation for the nth term of this sequence?

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Answers (1)

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Octavio Kelly · Answer 1

N=3:

A) an = 8*3+10 = 34

B) an = 8*3 - 14 = 10 OK

C) an = 16*3+10 = 58

D) an = 16*3 - 38 = 10 OK

n=5:

B) an = 8*5-14 = 26 OK

D) an = 16*5 - 38 = 42

So the answer is B