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C3 Range?!? watch

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    I realllllly don't understand how you work out the range of a function, i would reallly appreciate it if anyone could explain it for me simply please!

    eg. state the range of g(x) = 2x^2 - 3

    thanks!!
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    okay, the range is the possible values of y for those in the domain (which tells you the values of x). The best way is to find the values of the minimum/maximum. Then the range is all the values of above/below/between the points depending what's what.

    Hope that helps
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    OK, do you know what:

    The shape of the graph is?
    The lowest/highest possible value of g(x) is?
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    The graph is a positive x^2 curve, and thats all I'm saying. You should be able to sketch graphs and find lowest points by C3
 
 
 
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Updated: October 2, 2010

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