Find an equation for the nth term of the arithmetic sequence.
-15, -6, 3, 12, ...
an = -15 + 9(n + 1)
an = -15 x 9(n - 1)
an = -15 + 9(n + 2)
an = -15 + 9(n - 1)
show work and explanation show all your work please
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Expert's answer
2014-05-23T02:57:15-0400
As we can see the first term of this sequence is -15. The step of the arithmetic progression is a_2 - a_1 = -6 - (-15)=9 Then the nth term is a_n = a_0 + (n-1) d = -15 + 9(n-1.)
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