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August 4th, 2014, 11:57 AM  #1 
Newbie Joined: Aug 2014 From: SA Posts: 1 Thanks: 0  Arithmetic Progression
hi guys really need help with this question. Given that T(7)=23, T(n)=43 and T(2n)=91 for an A.P., find a, d and n. thanks good luck. Ray 
August 4th, 2014, 12:48 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  

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arithmetic, progression 
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