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If a, b, c are in AP then relation between a, b, c can be _________

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If a, b, c are in AP  then relation between a, b, c can be _________

(a) 2b = 2a + 3c

(b) 2a = b + c

(c) 2b = a + c

(d) 2c = a + c

I got this question during an online exam.

The question is from Arithmetic Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

1 Answer

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Best answer
Correct choice is (c) 2b = a + c

Easiest explanation: The term b should be the airthmetic mean of of term a and c.

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