Question

Which term of ap 3,10,17...Will be 84 more than its 13th term?

Answer 1

Answer: 25th term

Step-by-step explanation:

Here,

A= 3

D= 7

A13 = A +(N-1)D

= 3 + (13-1)7

=3 + 84

=87

Now ATQ,. .

An = 84 + A13

=84 + 87 = 171

An = a + (n-1)d

171 = 3 + (n-1)7

168= 7(n-1)

24= n-1

N= 25