What is the sum of the first 19 terms of the sequence 3,10,17,24,31
3,10,17, 24, 31, 38, 45, 52, 59, 66,73. 80, 87, 94,101, 108, 115, 122, 129,
The pattern is add 7 each time, so all you have to do is write it out and add them all up!
1,254
Sum of N term is 1,254
Number of term = 19
Sequence = 3,10,17,24,31
Sum of 19 term
Sum of N term = [n/2][2a + (n-1)d]
Sum of N term = [19/2][2(3) + (19-1)(7)]
Sum of N term = [19/2][6 + (18)(7)]
Sum of N term = [19/2][132]
Sum of N term = [19][66]
Sum of N term = 1,254
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