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Math Help - graph thingy

  1. #1
    Senior Member furor celtica's Avatar
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    graph thingy

    how does one sketch graphs of functions such as x^2 - e^x? i know that you must first sketch the graphs x^2 and -e^x; but then what? how are they combined? i'm talking sketching here, it can't be that complicated.
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  2. #2
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    Graph both functions like you have stated.

    You then look to add the co-ordinates of each graph to find the result. Pick some points that are more obvious to add i.e at x =0 and build on that.
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  3. #3
    Senior Member furor celtica's Avatar
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    do you mean to say that the ordinates must be added?
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  4. #4
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    Quote Originally Posted by furor celtica View Post
    how does one sketch graphs of functions such as x^2 + (- e^x)? i know that you must first sketch the graphs x^2 and -e^x; but then what? how are they combined? i'm talking sketching here, it can't be that complicated.
    Quote Originally Posted by furor celtica View Post
    do you mean to say that the ordinates must be added?
    of course.
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