Question

the formula for finding the common difference of an AP is
a) an=a+(n-1)d
b) Sn=n/2[2a+(n-1)d]
c) Sn=n(n-1)/2
d) d= To -Tq/p-q​

Answer 1

Answer:

A) an=a+(n-1)d....

Not sure, hope this helps you.....

Answer 2

Answer:

the formula for finding the common difference of an AP is an=a+(n-1)d ...