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Programming
Tutor: None Selected Time limit: 1 Day

Find the sum of the first 25 terms of the arithmetic sequence: 7,19,31,43,...

May 25th, 2015

Sum of n terms of an AP is given by 


Here, 

n=25

a1=7

d=19-7=12


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May 25th, 2015

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May 25th, 2015
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May 25th, 2015
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