Question

If $$k, 2k- 1$$ and $$2k + 1$$ are three consecutive terms of an  A.P., the  value of $$k$$ is

A
2
B
3
C
3
D
5

Solution

The correct option is B $$3$$The three consecutive terms $$k, 2k - 1$$ and $$2k + 1$$ are an A.P., thenWe know that, second term - first term = third term - second term$$2k - 1 - k = 2k + 1 - 2k + 1$$$$k - 1 = 2$$$$k = 3.$$Physics

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