How do I compute the following differentiation by chain rule?(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\frac{d}{d\lambda}(\lambda^{-1}\phi(\lambda^{-1}x))[/tex]

It is not a homework, but I can't figure out the exact way of getting the answer [itex]-\phi(x)-x^{s}\partial_{s}\phi(x)[/itex]

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# How do I compute the following differentiation by chain rule?

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