Question

the common difference of an AP can be expressed as
A) a n - a n-1
B) an - a n-2
C) an - a n+1
D) an - sn​

Answer 1

Answer:

A

Step-by-step explanation:

an is last term - a n-1 is last but one

difference is the difference

Answer 2

Answer:

option A

Step-by-step explanation:

Assume

an is 1

and common difference is 1

then, an-an-1