Question Detail

MTH 101 Arithmetic Progression Objective Question
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Question

Which of the following expressions correctly compute the sum of the first n terms of an AP?
Options
A S_n = (n/2)(a + l)
Correct Answer
B S_n = (n/2)[2a + (n - 1)d]
C S_n = n*a + [n(n - 1)d]/2
D S_n = [a(1 - r^n)]/(1 - r)
Correct Answer

Option A is the correct answer.

Detailed Explanation

The first three formulas are algebraically equivalent forms for the sum of an AP, while the fourth is the sum formula for a geometric progression.

Hint

No hint available

Question Info

Course: MTH 101
Topic: Arithmetic Progression
Type: Objective
Difficulty: Not specified
Question 675 of 696
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