Question:Iflog5(x2+x)-log5(x+1)=2, then the value of x is :
A 5 B 32 C 25 D 10
+ AnswerC
+ Explanationlog5(x2+x)-log5(x+1) =2⇒log5(x2+xx+1) =2 ∴log5[(xx+1x+1] =2orlog5x =2orx=52 =25.
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