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Question

For what value of p are 2p+1, 13, 5p3, three consecutive terms of an A.P. ?

A
2
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B
2
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C
4
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D
4
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Solution

The correct option is C 4
Given:
2p+1,13,5p3 are in A.P.
2×13=2p+1+5p3 [2b=c+a]
26=7p2
7p=28
p=4

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