1.

If (z=e^{ frac{x^2+y^2}{x+y}} ) then, (x frac{ z}{ x} + y frac{ z}{ y} ) is?

A. 0
B. zln(z)
C. z<sup>2</sup> ln u2061(z)
D. z
Answer» C. z<sup>2</sup> ln u2061(z)


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