Convert the recursive form a1=7, an=3an-1 to the explict form
1. an=7(3)^n1
2. an=7(3)^n+1
3. an=3(7)^n
4.an=3(7)^n-1
The correct explicit form for the given recursive form is:
3(7)^n
1. an=7(3)^n1
2. an=7(3)^n+1
3. an=3(7)^n
4.an=3(7)^n-1
3(7)^n