Question

an=a+(n-1)d a=5 , d=3, an=25 ​

Answer 1

Answer:

25=5+(n-1)3

25=5+3n-3

25=3n+2

25-2=3n

23=3n

n=23/3

so 25 is not a Ap of the given series.....

Answer 2

Answer:

N=23/3

An=25

A=5

D=3

An=a+(n-1)d

25=5+ (n-1)3

20=(n-1)3

20/3 =n-1

20/3+1=N

N= 23/3

Step-by-step explanation:

But N is always a whole no. So I think there is something wrong with the values you have given