Hey everyone. I'm a freshman in Algebra II and I'm in a bit of a problem. I was doing some hw on domain and range of a function and I'm not really sure what the U is:
i.e.
f(x)=1/5x-7
D:(-infinity, -7/5)U(-7/5, infinity)
*All I want to know is what the union thing is for and when you use it.
*And why is -infinity part of the answer? My original answer was D: [-7/5,infinity).
*What would you do to find the range? I know how to get the range in quadratic functions, but the 1/5x-7 confuses me. Thanks so much.
I know these are a lot of questions, but I just don't get Algebra! Geometry was more my thing...
2006-08-28
15:30:05
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3 answers
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asked by
Dragon
2