Question 9 of 44intermediate🔧 ApplyShort Answer4 marks
Find the number of terms in each of the following APs:
(i)
7, 13, 19, . . . , 205
Answer
The number of terms in the AP 7, 13, 19, . . . , 205 is 34.
(ii)
18, 15½, 13, . . . , -47
Answer
The number of terms in the AP 18, 15½, 13, . . . , -47 is 27.
Explanation
This question tests the application of the nth term formula of an AP: a_n = a + (n-1)d. By identifying the first term (a), common difference (d), and last term (a_n), we can solve for n to find the number of terms in the given AP.