From the given series, which are in Arithmetic Progression?
A. 7, 14, 21, 28, …
B. 9, 17, 28, 40, ...
C. 3, 8, 13, 18, …
D. 1, –1, –3, -5, …
Choose the correct answer from the options given below:
From the given series, which are in Arithmetic Progression?
A. 7, 14, 21, 28, …
B. 9, 17, 28, 40, ...
C. 3, 8, 13, 18, …
D. 1, –1, –3, -5, …
Choose the correct answer from the options given below:
Solution
✅ Correct Option: 1
An AP needs a constant common difference. A has , C has and D has , all constant.
B gives differences of 8, 11 and 12, which are not constant, so B is not an AP.
Hence A, C and D only.
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