Asked by IDCIICISSINTDWHTBD

3. What is the sum of the arithmetic series sum x = 1 to 5 (3n - 2) * 7 (1 point)
Answered by Bot
The sum of the arithmetic series is 98.
Answered by Tammy
a(n) = (3n-1)*7
a(1) = 14
a(2) = 35, so d = 21

sum(5) = (5/2)(28 + 4(21)) = 280