Question and Answers Forum

All Questions      Topic List

Logarithms Questions

Previous in All Question      Next in All Question      

Previous in Logarithms      Next in Logarithms      

Question Number 54875 by shaddie last updated on 13/Feb/19

Given that((log(3x+1)^(2x−1) )/(log(3x+1)))=5,find the value of x.

$$\mathrm{Given}\:\mathrm{that}\frac{\mathrm{log}\left(\mathrm{3x}+\mathrm{1}\right)^{\mathrm{2x}−\mathrm{1}} }{\mathrm{log}\left(\mathrm{3x}+\mathrm{1}\right)}=\mathrm{5},\mathrm{find}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\:\mathrm{x}. \\ $$

Answered by kaivan.ahmadi last updated on 14/Feb/19

log(3x+1)^(2x−1) =log(3x+1)^5 ⇒  (3x+1)^(2x−1) =(3x+1)^5 ⇒2x−1=5⇒  x=3

$$\mathrm{log}\left(\mathrm{3x}+\mathrm{1}\right)^{\mathrm{2x}−\mathrm{1}} =\mathrm{log}\left(\mathrm{3x}+\mathrm{1}\right)^{\mathrm{5}} \Rightarrow \\ $$$$\left(\mathrm{3x}+\mathrm{1}\right)^{\mathrm{2x}−\mathrm{1}} =\left(\mathrm{3x}+\mathrm{1}\right)^{\mathrm{5}} \Rightarrow\mathrm{2x}−\mathrm{1}=\mathrm{5}\Rightarrow \\ $$$$\mathrm{x}=\mathrm{3} \\ $$

Answered by Otchere Abdullai last updated on 14/Feb/19

solution  ((log(3x+1)^(2x−1) )/(log(3x+1)))=5  ⇒(((2x−1)log(3x+1))/(log(3x+1)))=5  ⇒2x−1=5  ⇒2x=5+1  ⇒2x=6  ⇒((2x)/2)=(6/2)  ⇒x=3

$${solution} \\ $$$$\frac{{log}\left(\mathrm{3}{x}+\mathrm{1}\right)^{\mathrm{2}{x}−\mathrm{1}} }{{log}\left(\mathrm{3}{x}+\mathrm{1}\right)}=\mathrm{5} \\ $$$$\Rightarrow\frac{\left(\mathrm{2}{x}−\mathrm{1}\right){log}\left(\mathrm{3}{x}+\mathrm{1}\right)}{{log}\left(\mathrm{3}{x}+\mathrm{1}\right)}=\mathrm{5} \\ $$$$\Rightarrow\mathrm{2}{x}−\mathrm{1}=\mathrm{5} \\ $$$$\Rightarrow\mathrm{2}{x}=\mathrm{5}+\mathrm{1} \\ $$$$\Rightarrow\mathrm{2}{x}=\mathrm{6} \\ $$$$\Rightarrow\frac{\mathrm{2}{x}}{\mathrm{2}}=\frac{\mathrm{6}}{\mathrm{2}} \\ $$$$\Rightarrow{x}=\mathrm{3} \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com