The value of $l o g_{3} 9 + l o g_{5} 25 + l o g_{2} 8$ is

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Solution

The correct option is D 7
$l o g_{3} 9 + l o g_{5} 25 + l o g_{2} 8$
= $2 l o g_{3} 3 + 2 l o g_{5} 5 + 3 l o g_{2}$ $(l o g_{a} a = 1)$
= 2+2+3
= 7

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