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Mathematics 16 Online
xXMarcelieXx:

help please how would you solve this

xXMarcelieXx:

\[\ln(x-2)-\frac{ 1 }{ 2 }\ln(x-1)=-\frac{ 1 }{ 2 }\ln(y+1)+\frac{ 1 }{ 2 }\ln(y-1)\]

xXMarcelieXx:

@sillybilly123

xXMarcelieXx:

i already did the partial fraction already and thats what i got on both sides....

sillybilly123:

\(\ln(x-2)-\frac{ 1 }{ 2 }\ln(x-1) = \ln(x-2)-\ln(x-1)^{\frac{1}{2}} = \ln \dfrac{x-2}{(x-1)^{\frac{1}{2}}}\)

sillybilly123:

the other one?

sillybilly123:

\(-\frac{ 1 }{ 2 }\ln(y+1)+\frac{ 1 }{ 2 }\ln(y-1)\) \(= -\frac{ 1 }{ 2 } \ln( \dfrac{y+1}{y-1})\)

sillybilly123:

really sorry Marcie, I may not be concentrating as well as I should on this.

xXMarcelieXx:

oh no D: .. its due tomorrow morning e.e

sillybilly123:

ok

xXMarcelieXx:

i cant seem to get the answer... since the answer is

sillybilly123:

they want you to find the value of c

xXMarcelieXx:

okay. so how do i do ...

xXMarcelieXx:

hmm okayy so how do i do that bc i followed ur steps but i ended up with a different answer D:

sillybilly123:

this is a different thread, you present some algebra from some other thread, and then suggest that I have mislead you on something?!?! you're not for real ?

xXMarcelieXx:

im just llost how they got that answer

sillybilly123:

Marcie, I am about to be suspended for nothing. I will, pending suspension, try to help.

xXMarcelieXx:

wait whaa D:

xXMarcelieXx:

no no im not saying that u mislead me... i followed ur steps.. its just that i got lost till the end of the eq

sillybilly123:

it's fine. :)

xXMarcelieXx:

no no im not saying that u mislead me... i followed ur steps.. its just that i got lost till the end of the equation..

sillybilly123:

ah, i remember typing that out

xXMarcelieXx:

this is what you posted from the previous post... i just got to the partial fraction. im trying to figure out how they got to the answer. im very bad at logs

sillybilly123:

OK!!

sillybilly123:

logs are actually very important

xXMarcelieXx:

well yeh... thats where im stucked but im not getting to the answer...

sillybilly123:

\(\log A + \log B = \log AB\)

xXMarcelieXx:

mmk

xXMarcelieXx:

so then

xXMarcelieXx:

this was number 9 and this is what i did

1 attachment
sillybilly123:

OK too tired tocheck anything but if YOU say that \(c = \ln C\) then you can add it into the logs on both sides and undo the Log thing. Make sense?

xXMarcelieXx:

uhh

sillybilly123:

lets say that: \(\ln Y = \ln X + C\) And that: \(C = \ln C'\) So: \(\ln Y = \ln X + \ln C'\) Or: \(\ln Y = \ln C' X \)

sillybilly123:

what i mean is get that constant INSIDE the log

sillybilly123:

if is some constant so is log (C') but, in the latter form, you can stuff it inside a log function

Nnesha:

https://prnt.sc/i6lk0x

Nnesha:

\[\frac{ 1 }{ 2 }(-\ln(y+1)+\ln(y-1))\] \[\frac{1}{2} [ \ln(y-1)-\ln(y+1)] = \frac{1}{2} [\ln(\frac{y-1}{y+1})]\]

xXMarcelieXx:

hmm ok

Nnesha:

as he said on the other post it will be easier to multiply both sides by 2 to get rid of the fraction

sillybilly123:

yeah, "he" said that

Nnesha:

he/she*

sillybilly123:

the trick is getting a constant C inside another constant log(C) so you can use log rules

Nnesha:

Sorry i jumped ino the middle of this please carry on

sillybilly123:

no you didn't.

sillybilly123:

Can you please carry on?

Nnesha:

still there ??

Nnesha:

https://prnt.sc/i6ltpk don't forget the constant when u integrate :=))

sillybilly123:

71 vs 69 there's only 1 winner there

sillybilly123:

🤔

Nnesha:

good job..

sillybilly123:

TU, ma'am :)

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