The fifth term of an arithmetic sequence is 11. If the difference between two consecutive terms is 1, what is the product of the first two terms?
I don't need the work, but please help I'm so tired and literally cannot do this.
d = 1
a5=11
a4 thus is 10
a3 is 9
a2 is 8
a1 is 7
7 x 8 = 56
