Mathematics
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OpenStudy (anonymous):
solveeeeee
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sam (.sam.):
\[\log_2{(\frac{x-5}{2x-3})^2}<0\]
sam (.sam.):
I'd recommend using rule
\[\huge \log_ab=c \leftarrow \rightarrow b=a^c\]
OpenStudy (anonymous):
but what is c here
sam (.sam.):
0
sam (.sam.):
\[\huge \log_ab=c \leftarrow \rightarrow b=a^c \\ \\ \huge (\frac{x-5}{2x-3})^2<2^0\]
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OpenStudy (anonymous):
yes.. i got the same
OpenStudy (anonymous):
now, rhs will become 1
sam (.sam.):
No you don't need it'll be just 1
OpenStudy (anonymous):
okay
sam (.sam.):
The sign should be x<-2
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sam (.sam.):
Why not expand it?
OpenStudy (anonymous):
okay
OpenStudy (anonymous):
expand
how
sam (.sam.):
\[\huge (\frac{x-5}{2x-3})^2<2^0 \\ \\ \huge \frac{(x-5)^2}{(2x-3)^2}<1 \\ \\ \huge x^2-10x+25<4x^2-12x+9\]
OpenStudy (anonymous):
okay
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OpenStudy (shubhamsrg):
you'll have to consider this actually :
-1 < (x-5)/(2x-3) < 1
OpenStudy (shubhamsrg):
one inequality at a time, 2 in total
and take intersection of both results
sam (.sam.):
Its ok we'll have restrictions later
OpenStudy (shubhamsrg):
hmm
OpenStudy (anonymous):
so what should i do
i mean should i follow @shubhamsrg or @.Sam. method
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OpenStudy (shubhamsrg):
both are the same thing, @.Sam. is getting to it, he might guide you step to step :)
OpenStudy (anonymous):
thank u
OpenStudy (anonymous):
@.sam i got
3x^2-2x-16<0
sam (.sam.):
Factor it
sam (.sam.):
Yes then you got
x=-2 and x=8/3
Using
|dw:1368187144112:dw|
We have
x<-2 and x>8/3
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OpenStudy (anonymous):
okay
OpenStudy (anonymous):
thank u @.Sam.
sam (.sam.):
But from
\[\log_2{(\frac{x-5}{2x-3})^2}<0\]
x values can only be less than zero, so the only answer is x<-2
OpenStudy (anonymous):
okay
sam (.sam.):
\[\log_2{(\frac{x-5}{2x-3})^2}\color{red}{<0}\]
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OpenStudy (anonymous):
i got it