Let X / z = ln (Z / y), find AZ / ax, AZ / ay

&#In this case, we take y as a constant x * 1 / z = ln (Z / y) so 1 / Z \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\8706z + X / Z (?) = Z / (x + Z)

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