anonymous
  • anonymous
okay.. simplify this.. r/r-1 - r²/r² .... good luck lol
Mathematics
chestercat
  • chestercat
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dumbcow
  • dumbcow
well, r^2/r^2 = 1
anonymous
  • anonymous
r/r-1 - 1 r-r-1/r-1 -1/r-1
anonymous
  • anonymous
r/r-1 - r²/r² r²/r²=1 (r/r-1)-1 (r/r-1)-(r-1/r-1) r-r-1/r-1 -1/r-1

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anonymous
  • anonymous
where did the second r come from din?
dumbcow
  • dumbcow
\[\frac{r}{r-1} - 1 = \frac{r}{r-1} -\frac{r-1}{r-1} = \frac{r-(r-1)}{r-1} = \frac{1}{r-1}\]
anonymous
  • anonymous
I'm sorry, how are you getting r-1/r-1?
dumbcow
  • dumbcow
just adding it, but because it equals 1 it doesn't change expression's value
anonymous
  • anonymous
ooo
dumbcow
  • dumbcow
thats the only way to combine fractions, get a common denominator
anonymous
  • anonymous
hmm
anonymous
  • anonymous
thanks for your explanations dumbcow.
dumbcow
  • dumbcow
no problem, thats how you learn thanks for wanting them :)

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