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Question

If log32,log3(2x5)and log3(2x72) are in AP, then x is equal to


A
2
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B
3
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C
4
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D
2,3
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Solution

The correct option is B 3
(2x5)2=2(2x72)let2x=tt210t+25=2t7t212t+32=0(t8)(t4)=0x=2,3

Mathematics

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