anonymous
  • anonymous
Determine the domain: f(x)=sqrt 5-x and f(x)=sqrt -2/x^2+2x-3
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
\[sqrt{5-x}\]
anonymous
  • anonymous
still not working. ok for the first one you must have 5-x>= 0 so 5>=x or x<=5
anonymous
  • anonymous
because apparently for real numbers you cannot take the square root of a negative number.

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anonymous
  • anonymous
all numbers except -3 and 1
anonymous
  • anonymous
in fact the domain of a function is supposed to be specified with the function. for the second one the denominator cannot be 0 and dioscarr has the answer.
anonymous
  • anonymous
factor the bottom and equal everything to zero

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