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anonymous
 5 years ago
The tenth term of an arithmetic sequence is
37
2
,
and the second term is
5
2
.
Find the first term. Can someone help?
anonymous
 5 years ago
The tenth term of an arithmetic sequence is 37 2 , and the second term is 5 2 . Find the first term. Can someone help?

This Question is Closed

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.0for any arithmetic series An = A1 + (n1)*d A10 = 37/2 = A1 +(101)*d > 37/2 = A1 + 9d > A1 = 37/2  9d To solve for d use second term and substitute in for A1 A2 = 5/2 = (37/2 9d) +(21)d >5/2 = 37/2 8d >(537)/2 = 8d >16 = 8d >2=d substitute for back in for d to find A1 A1 = 37/29(2) =37/2  18 =37/2  36/2 = 1/2
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