Answer:
Step-by-step explanation:
a) subtract -(2+n) from each successive term in the series, from 12, and where n is an integer starting from 0
b) each term is 3^n where n is an integer starting at 0
c) add 15 to each successive term in the series, starting at 4
d) add even numbers to each successive term in the series, starting at 5 then add 2*n where n is an integer starting at 1
