Question

last terms are not clear in that image see these are last terte
1)..(10th term)
2)..(25th term)
3)...(18th term)​

Answer 1

(ii)

b-a

=2x-x=x

d=x

25th term is 25x

(iii)

b-a

=2π-π = π

d= π

18th term is 18π