anonymous
  • anonymous
I must be dense! I can't grasp what is apparently the most important part of algebra--function, domain and range. Domain is x variables (input) and range is y variables (output) but what does that mean?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
If f(x)=2, find the range and domain of the function f
anonymous
  • anonymous
Domain is all the possible x values you can plug into the function. A lot of the time, the domain is over all real numbers, but for functions like y = 1/x, for example, there are numbers that you can't plug in for x without getting something impossible for y (in this case, the domain is all real numbers except for 0). Range is all the possible y values you can attain from a function. Again, the range is often all real numbers, but for y = 1/x, for example, the range would be, again, all real numbers except for 0, because there is no x value you could possibly plug in to make y = 0. This might help?
anonymous
  • anonymous
I'm going to have to re-read this after some sleep. I'm shot. Thanks so much. Hopefully I can plug this into my brain.

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