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March 22nd, 2011, 06:28 AM   #1
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Arithmetic Progression help!

for hours i've been dealing with this problem and yet i cant really solve it. can you please help me with this one.

PROBLEM
The fifth term of an arithmetic sequence is 24 and the sum of the first 10 terms is 265. write the first three terms of the sequence.



please help me. thank you in advance.
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March 22nd, 2011, 07:02 AM   #2
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Re: Arithmetic Progression help!

(1): sum of an arithmetic series:
(2): nth term of an arithmetic progression:

From (1): (3)

From (2): (4)

Multiply (4) by 10: (5)

Subtract (5) from (3):

First 3 terms: 4, 9, 14 . . .
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