'Common Difference' Sequences
The general term for term number 'n' , common diff. 'd' and first term 'a'is:
dn + (a-d)
Find the nth term in this sequence : 13, 20, 27, 34, 41, 48 ...
a=13, d= 7
nth term = dn + (a-d) = 7n + (13-7) = 7n +6
this is one way of finding the nth term but its long i knoww
i get confused with the other ones though