show that
∆^2/∆x^2+∆^2/∆y^2(Re f(z))^2=2|f'(z)|^2
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Gg from which the attached file is scanned image in PDF format is a long time ago I am not sure if you have any questions or need a long time
Step-by-step instructions for class explanation:5ygggh g phone d j 66
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