my question is - Find an expression for the nth term of each sequence.

a. 6,15, 28, 45, 66

b, 1/5, 3/8, 5/13, 7/20, 6/29 - these are fractions

my name- shakira
level of question - secondary - 11-14
who is asking the question - teacher

 

Shakira,

I can give you a hint for a.

6 = 2 x 3
15 = 3 x 5
28 = 4 x 7

Penny