

InterviewSolution
Saved Bookmarks
1. |
Is 68 a term of the A.P. 7, 10, 13,… ? |
Answer» Given, A.P. 7, 10, 13,… Here, a = 7 and d = a2 – a1 = 10 – 7 = 3 We know that, nth term an = a + (n – 1)d Required to check nth term an = 68 a + (n – 1)d = 68 7 + (n – 1)3 = 68 7 + 3n – 3 = 68 3n + 4 = 68 3n = 64 ⇒ n = 64/3, which is not a whole number. Therefore, 68 is not a term in the A.P. |
|