1. Which of the following is the correct formula in finding the sum of the terms of a given arithmetic sequence?
A. Sn = [22: + (n - 1)d] = 2a: n
B. Sn = [2a1 + nd]
C. Sn = { [a1 + (n - 1)d]
ai - n2 2 2 2
2. Which set of values must be obtained in order to find the sum of the terms of an arithmetic sequence?
A. ai, nand d
B. ai, an and d
C. ai, an and n
3. A car travels 250 meters on the first minute, 340 meters on the second minute, 430 meters on the third minute, and so on. What is the total distance the car travels after 5 minutes?
A. 2,010 meters
B. 2,060 meters
C. 2,150 meters
4. In finding the sum of the first 8 terms of the arithmetic sequence 7, 15, 23, 31, which formula must be used?
A. an = a + (n-1)d
B. Sn = [2a1 + nd]
C. Sn = { [2a1 + (n - 1)d] n - 2
For items 5 and 6, please refer to the given problem below. Problem: If the sum of the first 15 terms of an arithmetic sequence is 375 and its first term is 4, then
5. Where will you substitute the value of 375 in the arithmetic series formula?"
А.1
B.d
C. Sn
6. Find the value of 15th term (a15).
A 42
B. 44
C. 46