anonymous
  • anonymous
logx-log6=log15
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
HINT: logx-log6 = log(x/6)
anonymous
  • anonymous
Now, can u?
TheViper
  • TheViper
so \(\frac{x}{6}=15\) ?? @sauravshakya

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anonymous
  • anonymous
Yep... @TheViper
TheViper
  • TheViper
Yeah I hoped :) THANX ;)
anonymous
  • anonymous
WElcome
vishweshshrimali5
  • vishweshshrimali5
@yeller33 see, log a- log b = log(a/b) and log a + log b = log (ab) remember these 2 formula for ever
anonymous
  • anonymous
log(x) - log(6) = log(15) Add log(6) to each side: log(x) = log(15) + log(6) = log(15 times 6) x = 15 times 6 x = 90
vishweshshrimali5
  • vishweshshrimali5
Gud
anonymous
  • anonymous
|dw:1345303238963:dw|And , right? @vishweshshrimali5
vishweshshrimali5
  • vishweshshrimali5
Yes @sauravshakya absolutely correct
anonymous
  • anonymous
okay i understand thanks guys!
anonymous
  • anonymous
Welcome
anonymous
  • anonymous
how do you do it if it has a number at the end. = log7+logx=2.... the 2 throws me off.
Kaederfds
  • Kaederfds
x is 90
anonymous
  • anonymous
log7 + logx=2 log(7*x)=2
anonymous
  • anonymous
Does it help?
vishweshshrimali5
  • vishweshshrimali5
and remember that \[\large log_a a = 1\]
anonymous
  • anonymous
x=2//7?? ( 7x=2 )
vishweshshrimali5
  • vishweshshrimali5
Thus u can write 2 = 2* 1 = \(\large 2* log_{10} 10\) also
anonymous
  • anonymous
log7 + logx=2 log(7*x)=2 10^2 = 7*x 100/7=x
vishweshshrimali5
  • vishweshshrimali5
\[\large b\space log _a x = log_a (b^x)\]
vishweshshrimali5
  • vishweshshrimali5
That's how @sauravshakya got the third step
anonymous
  • anonymous
got it? @yeller33
vishweshshrimali5
  • vishweshshrimali5
i can write 2 = \(\large \log_{10} (10^2)\)
anonymous
  • anonymous
Yep @vishweshshrimali5
vishweshshrimali5
  • vishweshshrimali5
:)
anonymous
  • anonymous
log7 + logx=2 log(7*x)=2 1/2 log(7x)=1 log{(7x)^1/2} = log10 (7x)^(1/2) = 10 7x = 100 x=100/7
anonymous
  • anonymous
according to @vishweshshrimali5
anonymous
  • anonymous
can you two see if i did this one correctly: logx+log8=1 log8*logx=1 8x=1 8x=10^1 10/8
anonymous
  • anonymous
i tried to follow your explanations.
anonymous
  • anonymous
dont think so
anonymous
  • anonymous
your second step is wrong
anonymous
  • anonymous
logx+log8= log8x
anonymous
  • anonymous
and 1=log10
anonymous
  • anonymous
got your mistake?
anonymous
  • anonymous
i think so . thanks again!

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