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Thread: Curve sketching help

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    Curve sketching help

    Does anyone know how and why my teacher divided up the curve into regions y=x and y=x-1?

    Thanks in advance D

    maths curve sketching xd.JPG

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    Re: Curve sketching help

    I've heard of something similar where you graph the numerator and denominator separately to make a "sign diagram" so you can tell which side of the y-axis the line will be. But that doesn't have anything to do with critical points.
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