SOLUTION: I need to find the 20th partial sum of sequence 17,23,29,35... I have found d=6 and the 20th term is 131, but what next to find partial sum? Thank You

Question 140683: I need to find the 20th partial sum of sequence 17,23,29,35... I have found d=6 and the 20th term is 131, but what next to find partial sum? Thank You
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the 20th partial sum of sequence 17,23,29,35... I have found d=6 and the 20th term is 131
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S(20) = (20/2)(a(1) + a(20))
S(20) = 10[17 + 131]
S(20) = 10*148
S(20) = 1480
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Cheers,
Stan H.
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