Hello, I was wondering if anyone can help me with this problem.(adsbygoogle = window.adsbygoogle || []).push({});

Show that the line with equation 2ax+2by=a^2+b^2

is tangent to the circle with equation 4x^2+4y^2=a^2+b^2

If this is true, wouldn't the derivative of the circle equation be equal to the first equation? Would I just take the partial derivative with respect to X and then to Y?

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# Homework Help: Multivariable Tangent Lines

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