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Mathematics 7 Online
OpenStudy (anonymous):

help plz

OpenStudy (mayankdevnani):

shoot

OpenStudy (anonymous):

1st question \[2logx- \log(x+6)= 3\log2\]

OpenStudy (anonymous):

2nd question.. \[4\log_{2} (x^{2} + 1 ) = \log_{2} 625\]

OpenStudy (anonymous):

\[4\log_{2} (x^2+1) = \log_{2} (x^2+1)^4\]

OpenStudy (anonymous):

\[\log_{2} 625 = \log_{2} 5^4\]

OpenStudy (anonymous):

I think nw u can solve this by equating..)

OpenStudy (anonymous):

1st can be written as \[\Large \log x^2-\log(x+6)=\log 2^3\] or \[\Large \log (\frac{x^2}{x+6})=\log 8\] \[\Large \implies \frac{x^2}{x+6}=8\] i hope now you can solve this using Quadratic equation \[\Large \implies x^2-8x-48=0\]

OpenStudy (anonymous):

3rd question \[\left(\begin{matrix}\log (x ^{2} + y ) - \log (x-2y) = 1 \\ 5^{x+1} = 25^{y+1}\end{matrix}\right)\]

OpenStudy (anonymous):

\[(x^2+1)^4 = 5^4\] \[x^2+1=5\] \[x^2 = 4\] \[x=\pm2\]

OpenStudy (anonymous):

Did u understand @Muskan

OpenStudy (anonymous):

yess

OpenStudy (anonymous):

question 4.. \[\frac{ 1 }{ x } + \frac{ 1 }{ y } = 1 - \frac{ 1 }{ xy }\] \[xy=6\]

OpenStudy (anonymous):

Lol...u r trying to hit 4 mangoes with one stone...)

OpenStudy (anonymous):

yes..

OpenStudy (anonymous):

Agaimst COD....

OpenStudy (anonymous):

i have no time for do these questions..

OpenStudy (anonymous):

question 5 Gauss 5x−4y+3z=9 2x+y−2y=1 4x+3y+4z=1

OpenStudy (nubeer):

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