Find the sum of the first 10 terms of the AP 3, 9, 15, ...
Answer and explanation
Correct answer: C. 300
- Step 1: S = n/2 x [2a + (n - 1)d].
- Step 2: 10/2 x [6 + 54] = 300.
Answer
300.
Practise more Sequences and Series.
Free questions with an explanation for every one, and full timed CA Foundation mock tests.
More Sequences and Series questions
- Find the 7th term of the GP 2, 4, 8, ...
- Find the sum of the first 10 terms of the AP 9, 11, 13, ...
- Find the sum of the first 15 terms of the AP 6, 8, 10, ...
- Find the sum of the first 20 terms of the AP 5, 7, 9, ...
- Find the 6th term of the GP 3, 9, 27, ...
- Find the sum of the first 10 terms of the AP 6, 10, 14, ...