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the 4th term of an arithmetic sequence is 18 and the 6th term is 28. what is the 2nd term ?​

Sagot :

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Find the Common difference

Given:

a6=28

4th=18

n=6

d=2

[tex]an=a1+(n-1)d \\ 28 = 18 + (6 - 1)d \\ 28 = 18 + 5d \\ = 28 - 18 = 5d \\ 10 = 5d \\ = 2d[/tex]

Find the 2nd term

10,12,14,16,18,20,24,26,28