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Math Help - Determine values

  1. #1
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    Determine values

    Dear all,

    Would appreciate some guidance for this question:

    If q = ax + by and r = bx - ay, determine the value of:
    Determine values-equation.jpg

    Thank you.
    Last edited by HelpMath; January 27th 2009 at 04:30 PM.
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  2. #2
    Super Member Showcase_22's Avatar
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    If q=ax+by then would \frac{dq}{dx}=a so \frac{dq}{dx}\frac{1}{y}=\frac{1}{y}?

    Is b also a constant?
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  3. #3
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    Had edited the equation above in image format for better viewing.
    Thank you...
    Last edited by HelpMath; January 27th 2009 at 05:13 PM.
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