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Question
Find x, if : logx 625 = - 4
Sum
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Solution
logx 625 = - 4
⇒ 625 = x- 4 ...[ Removing logarithm ]
⇒ 54 = `( 1/x )^4`
⇒ 5 = `1/x` ....[ Powers are same, bases are equal ]
⇒ x = `1/5`
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