Question 139710
Write the series in summation notation. Use the index i and let i begin at 1 in each summation. 
 9 + 14 + 19 + 24 + 29
a(n) = 9 + 5(n-1)
a(n) = 9 + 5n-5
a(n) = 4+5n
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Summation Notation:
Sum from i=1 to n of (4+5n)
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Cheers,
Stan H.