Question

Find the value of y in the sequence 2, 8, 3y +5,...

1. If the sequence was arithmetic
2. If the sequence was geometric

Answer 1

1. If the sequence is arithmetic to find the needed value we have to know the common difference which is 6.
Then we have the
`3y+ 5 = 14 y = 3`term = 14
2. If the sequence was geometric we had to know the common ratio = 8/2 = 4
So the answer is :
`3y + 5 = 32 3y = 27 y = 9`