Q20 of 40 Page 1

The nth term of an AP is (7 – 4n), then what is its common difference?

An = 7 – 4n

∴ a1 = 7 – 4 (1) = 3


a2 = 7 – 4(2) = -1


∴ d = a2 – a1 = -1-3 = -4


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