Question:If`log_5 (x^2 + x) - log_5 (x + 1) = 2,` then the value of x is : 

A `5` 
B `32` 
C `25` 
D `10` 

+ Answer
C 

+ Explanation
`log_5 (x^2 + x) - log_5 (x + 1)`

`= 2 ⇒ log_5 ((x^2 + x)/(x + 1))`

`= 2`

`:.log_5 [ (x (x + 1)/(x + 1)]`

`= 2 or log_5 x`

`= 2 or x = 5^2`

`= 25.`

+ Report

Irin Moni

Editor, VCampus

Your Name

Your Email

Type of Report
Spelling MistakeIncorrect AnswerGrammar MistakeContent MissingImproper Text FormatInsufficient AnswerDuplicate QuestionImproper Sentence StructureImproper Equation/FormulaOther

Description