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March 22nd, 2011, 06:28 AM  #1 
Member Joined: Nov 2010 Posts: 39 Thanks: 0  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. 
March 22nd, 2011, 07:02 AM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,931 Thanks: 1125 Math Focus: Elementary mathematics and beyond  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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