Arithmetic Ability
Logarithms

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Q.

if log105+log(5x+1)=log10(x+5)+1,then x is equal to

View Answer

Correct choice: B

Explanation:

log105+log(5x+1)=log10(x+5)+1 log10[5(5x+1)]=log10[10(x+5)] 5(5x+1)=10(x+5) 5x+1=2x+10 3x=9 x=3
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