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Question

The value of ‘x’, when 3x=39 is:


A

32

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B

23

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C

2

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D

3

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Solution

The correct option is A

32


3x=39
9.3x=3
32.3x=(3)12

am×an = a(m+n)

32+x=(3)12
Since bases are equal powers should also be equal
x+2=12
x=122=32


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