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Which of the following is in an A.P.? 

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Which of the following is in an A.P.? 

(A) 2, 5, 7, … 

(B) 22 , 32 , 72 , … 

(C) x, x2 , x3 , … 

(D) 1, 3, 5, …

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1 Answer

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Correct option is (D) 1, 3, 5, ...

a, b, c are said to be in AP if the Common difference between any two consecutive number of the series is same.

i.e., b - a = c - b \(\Rightarrow\) 2b = a + c

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