find the value of p so that (3p+7) (2p+5) (2p+7) are in AP
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I hope this is correct answer
if a , b , c are in AP then
2b = a+ c
=> 2(2p+5)= 3p+7 + 2p + 7
4p+ 10 = 5p + 14
p = -4
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