Question

A(n)=12+(n-1)(3)

Answer 1

its a general term for an arithmetic series it can be simplified to

A(n) = 3n + 9

Answer 2

the question is find the first fourth and tenth term of the arithmeticsequence described by the given rule

Answer 3

well substitute n = 1 for 1st

n = 4 for 4th

n = 10 for 10th

Answer 4

A IS 12,21,39 B is 3,24, 27 c is 12,24,22 d 0,9,27

Answer 5

well just do the substitution

A(1) = 12 + (1 -1)*3

A(4) = 12 + (4 -1)*3

A(10) = 12 + (10 - 1)*3