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September 5, 2015

Homework Help: Algebra 2

Posted by Sammy on Thursday, March 15, 2012 at 1:21am.

Write a rule for the nth term of the arithmetic sequence. ( I'm not sure how I'm suppose to write the numbers below a :C so bare with me )

a(2) = - 28, a(20) = 52

I used the formula a(n) = a(1) + ( n-1)d
a(20) = a(1) + (20-1)d > 52 = a(1)+19d
a(2) = a(1) + (2-1)d > -28= a(1) + 1d
And thats where I'm stuck >_< please help. Thanks :)

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