Question Detail

MTH 101 Arithmetic Progression Objective Question
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Question

Sum of first 15 terms of AP 4, 9, 14, ...
Options
A 585
Correct Answer
B 712
C 715
D 720
Correct Answer

Option A is the correct answer.

Detailed Explanation

S_n = n/2[2a + (n−1)d] = 15/2[8+14×5]=7.5[8+70]=7.5×78=585.

Hint

S_n = n/2[2a + (n−1)d].

Question Info

Course: MTH 101
Topic: Arithmetic Progression
Type: Objective
Difficulty: Not specified
Question 51 of 696
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