anonymous
  • anonymous
f(x) = \sqrt[4]{x^2 - 7 x}.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
f(x) = \sqrt[4]{x^2 - 7 x}. I need to find the domain of this.
anonymous
  • anonymous
do you mean \[\sqrt[4]{x^2 - 7x}\]
anonymous
  • anonymous
yes

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anonymous
  • anonymous
what level of math is this? algebra 1, 2, or calc?
anonymous
  • anonymous
calculus
anonymous
  • anonymous
the x^2-7x is what is in the square root, and the question is asking me to find the domain/
anonymous
  • anonymous
\[(x^2 - 7x)^.25 = 0\]
anonymous
  • anonymous
sorry..im having problems with the equation editor...but that is meant as 1/4
anonymous
  • anonymous
so the domain is 1/4?
goformit100
  • goformit100
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anonymous
  • anonymous
hold on...
anonymous
  • anonymous
raise both sides of the equation to the 4th power to get \[x^2 -7x = 0\] do you see it now....domain? range?
anonymous
  • anonymous
I don't remember how to get the domain when it is x^2
anonymous
  • anonymous
domain is x values
anonymous
  • anonymous
yes so it would be x^2=7x....so what would I do after that?
anonymous
  • anonymous
almost...let me write it out...
anonymous
  • anonymous
\[x(x-7) = 0\]
anonymous
  • anonymous
you have two values x = 0 and x = 7
anonymous
  • anonymous
yes!
anonymous
  • anonymous
so that means that x can't equal 0 or 7 so how would I write that out using an online application?
anonymous
  • anonymous
you familiar with set notation?
anonymous
  • anonymous
no I am not
anonymous
  • anonymous
\[{x \in R: x \le 0 or x \ge 7}\] means that x is in an element of the real numbers where x is less than or equal to zero OR x is greater than or equal to 7
anonymous
  • anonymous
is it asking for the range as well?
anonymous
  • anonymous
no just the domain
anonymous
  • anonymous
then that's it.
anonymous
  • anonymous
do you need further assistance?
anonymous
  • anonymous
what is the notation for greater than or equal, same with smaller than or equal
anonymous
  • anonymous
\[\ge \] is greater than or equal to....reverse the direct for less than or equal to
anonymous
  • anonymous
it's not working
anonymous
  • anonymous
|dw:1378776920259:dw|
anonymous
  • anonymous
does that help?
anonymous
  • anonymous
no I understand it's just that I can't get the notation to work on the program that my assignment is on
anonymous
  • anonymous
ok...i dont know how to help you there...but the answers are solid.
anonymous
  • anonymous
okay well thank you

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