Question

If the common difference of an AP is 5 then the value of a20_a13​

Answer 1

Answer:

answer is 35

I hope it help u

Answer 2

Answer:

as we don't know the first term here so

a=unknown

d=5

a[20] = a+(20-1)5

= a+ 95

a[13] = a+(13-1)5

= a+ 60