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Per NCERT, the growing pattern of squares (Fig. 8.3, with 4 squares added at each stage) generates the AP 1, 5, 9, 13, ... What is the first term and common difference?
AFirst term a = 1; common difference d = 4
Ba = 1, d = 5
Ca = 5, d = 4
Da = 4, d = 1
Answer & Solution
Correct answer: A. First term a = 1; common difference d = 4
Per NCERT §8.4, the sequence 1, 5, 9, 13 has a = 1 and d = 5 − 1 = 4.
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