The first Arthmatic sequence is 23 and the 12th term is 72.
Determine the first three terms in the sequence and the nth term and also Determine the Value of 10th term
I will assume you meant to say:
The first term of an arithmetic sequence is 23 and the 12th term is 72.
So a = 23 , and a+11d = 72
23+11d = 72
11d = 49
d = 49/11
take over, all you have to do is use the formulasposted by Reiny