Question

Which term of the A.P 4, 9, 14, 19 __________ is 104?

Answer 1

let

nth term = 104

=> 4 + (n-1)5 = 104

=> 4 + 5n - 5 = 104

=> 5n. = 105

=> n = 21

therefore 21th term is 104

Answer 2

Step-by-step explanation:

given: a = 4 , d = 5, aₙ= 104

=> aₙ = a + (n - 1) d

=> 104 = 4 + (n - 1) 5

=> 104 = 4 + 5n - 5

=> 104 = 5n - 1

=> 104 + 1 = 5n

=> 105 = 5n

=> n = 105/5 = 21

therefore 21st term is 104