7, 18, 29, 40, 51
Supposedly we take the above-stated sequence and find its nth term. Now since we have already identified that this sequence has a common difference, we know that it is a geometric sequence, hence we can easily use the below-mentioned formula.
Geometric Nth Term Formula
Nth term Formula= a + (n-1)d
a= first term in the sequence
d= common difference
n= number of terms
In our case, a= 7, d=11. but n is not identified, so you just plug in the values in the above-mentioned formula.
Nth term= 7 + (n-1) 11
= 7 + 11n - 11
= 11n - 4
