Question

The 20th term of the AP 9,13,17,21

Answer 1

Answer: given;

a(first term)=9

d(common difference)=13-9=4

therefore,

Tn=a+(n-1)d

now putting the value of a and d, we get the

20th term,

T(20)=9+(20-1)4

=9+19×4

=9+76

=85 is the answer..

hope it will help you.

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