Identify the formula for finding the nth term of an arithmetic sequence, where a(n) is the nth term of an arithmetic sequence, a is the first term, n is the term number and d is the common difference.

a) a(n)=a+(n)(d−1)

b) a(n)=a+(n+1)d

c) a(n)=a+(n−1)d

d) a(n)=a−1+(n−1)d

The answer is letter c. If we talked about arithmetic sequence it has the explicit formula: A(n)= a+(n-1)d. So it showed in the choices that letter c has the correct formula for arithmetic sequence. It is the only formula if you are going to find nth term of an arithmetic sequence. 

Where are the answer choices?

Ttgffgfdddtdydyfydys