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Mathematics
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OpenStudy (anonymous):
help plz
13 years ago
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OpenStudy (mayankdevnani):
shoot
13 years ago
OpenStudy (anonymous):
1st question
\[2logx- \log(x+6)= 3\log2\]
13 years ago
OpenStudy (anonymous):
2nd question..
\[4\log_{2} (x^{2} + 1 ) = \log_{2} 625\]
13 years ago
OpenStudy (anonymous):
\[4\log_{2} (x^2+1) = \log_{2} (x^2+1)^4\]
13 years ago
OpenStudy (anonymous):
\[\log_{2} 625 = \log_{2} 5^4\]
13 years ago
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OpenStudy (anonymous):
I think nw u can solve this by equating..)
13 years ago
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
\[\Large \implies x^2-8x-48=0\]
13 years ago
OpenStudy (anonymous):
3rd question
\[\left(\begin{matrix}\log (x ^{2} + y ) - \log (x-2y) = 1 \\ 5^{x+1} = 25^{y+1}\end{matrix}\right)\]
13 years ago
OpenStudy (anonymous):
\[(x^2+1)^4 = 5^4\]
\[x^2+1=5\]
\[x^2 = 4\]
\[x=\pm2\]
13 years ago
OpenStudy (anonymous):
Did u understand @Muskan
13 years ago
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OpenStudy (anonymous):
yess
13 years ago
OpenStudy (anonymous):
question 4..
\[\frac{ 1 }{ x } + \frac{ 1 }{ y } = 1 - \frac{ 1 }{ xy }\]
\[xy=6\]
13 years ago
OpenStudy (anonymous):
Lol...u r trying to hit 4 mangoes with one stone...)
13 years ago
OpenStudy (anonymous):
yes..
13 years ago
OpenStudy (anonymous):
Agaimst COD....
13 years ago
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OpenStudy (anonymous):
i have no time for do these questions..
13 years ago
OpenStudy (anonymous):
question 5
Gauss
5x−4y+3z=9
2x+y−2y=1
4x+3y+4z=1
13 years ago
OpenStudy (nubeer):
|dw:1349533310681:dw|
13 years ago
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