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in Arithmetic Progression by (47.3k points)
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Justify whether it is true to say that the 2n – 3 are the nth terms of an AP.

1 Answer

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Best answer

Put n = 1, 2, 3, 4

We get

a1 = 2(1) - 3 = - 1

a2 = 2(2) - 3 = 1

a3 = 2(3) - 3 = 3

a4 = 2(4) - 3 = 5

List of AP is - 1, 1, 3, 5 . . . .

a2 - a1 = 1 - (- 1) = 2

a3 - a2 = 3 - 1 = 2

a4 - a3 = 5 - 3 = 2

which form an AP, with common difference , d = 2

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