Question

the 21th term of the arithmetic progression is 5,7,9,11 is​

Answer 1

Answer:

tn=a+(n-1)d

t21=5+(21-1)×2

=5+20×2

=5+40

=45

Answer 2

Answer:

here a= 5 b=7, means difference

(d) =2 t21=?

t21=a+(n-1) d

=5+(21-1) 2

=5+20×2

=5+40

=45