Foundation
Mathematics Foundation
nth term of AP
Question
What term of the AP 72, 63, 54, ...... is 0 ?
Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.
Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA
Solution
Let the nth term of 72, 63, 54, ..... be 0. Then,
Tn = 0 ⇒ 72 + (n – 1) × (–9) = 0 ⇒ 9n = 81 ⇒ n = 9.