Raymond B. answered 01/11/21
Math, microeconomics or criminal justice
3, -6, 12, 4, 20 , 13, 27, 21, 33, 28, 38, ...
starting at 3, the next term is 3-9 = -6, next term is -6+2(9) = 12
next term is 12-8= 4, next term is 4+2(8) = 20, next term is 20-7=13, next term is 13 + 2(7) = 27
the differences between terms follows a pattern -9, +2(9), -8 + 2(8), -7, + 2(7), -6, +2(6), -5 + 2(5) ....