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Find the nth term and the 10th term of the arithmetic sequence.

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A= 5/2 d= -1/2

asked Nov 22, 2013 in ALGEBRA 1 by payton Apprentice

1 Answer

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In arthmetic sequence a n = a+(n-1)d

a is first term and d is common difference.

Given a = 5/2 and d = -1/2

10th term is a+9d = 5/2+9*-1/2

= 5/2-9/2

= -4/2

= -2

nth term is 5/2+(n-1)-1/2 = 5/2-n/2+1/2

= (5-n+1)/2

= (6-n)/2

= 3-n/2

answered Nov 22, 2013 by william Mentor

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