Find the common differece of the sequence: 2,9,16,23

The sequence is increasing by 7 each time.

So if 2 is the first term then if n=1 then n+1=sequence so far but

second term is 9 so if n=2 then the 2nd term=9

you must use trial and error to find

so it is

7n-5 so if n=1 then

7 (1) - 5=7-5=2

if n=2 then

7 (2) - 5=14-5=9

sucess

the equation is 7n-5