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    sim0nz12345's Avatar
    sim0nz12345 Posts: 77, Reputation: 2
    Junior Member
    		  
    #1

    Feb 16, 2008, 06:01 PM
    Range of function
    How would you find the following range with calculas

    y=x^2+1, x is a SUBSET of [-2,1]

    It's not just a matter of subbing it in because that would be too easy.
    ISneezeFunny's Avatar
    ISneezeFunny Posts: 4,175, Reputation: 821
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    #2

    Feb 16, 2008, 06:19 PM
    x is a subset of -2 and 1, which means that's the DOMAIN.

    plug it in your calculator. Graph it.

    now, on the x-axis, look between -1 and 1.

    now, on the y-axis, see how far (up and down) your graph goes. That's your RANGE.
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #3

    Feb 16, 2008, 06:20 PM
    It would appear that the domain in this case is over the interval [-2,1].

    The range is what you get upon subbing in those values.

    That appears to be all there is to it.
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