Which of the following list of numbers is/are an Arithmetic Progression?
(A) -2, 2, -2, 2, -2, ...
(B) 1, -1, -3, -5, ...
(C) 21, 18, 15, ...
(D) 20, 17, 14, 11, ...
Choose the correct answer from the options given below:
Which of the following list of numbers is/are an Arithmetic Progression?
(A) -2, 2, -2, 2, -2, ...
(B) 1, -1, -3, -5, ...
(C) 21, 18, 15, ...
(D) 20, 17, 14, 11, ...
Choose the correct answer from the options given below:
Solution
✅ Correct Option: 4
An AP needs a constant common difference. In (A) the differences alternate between and , so it is not an AP. In (B) , in (C) and in (D) , all constant. Hence only (B), (C) and (D) are APs.
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