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If z= log""(x^2 + y^2)/(x+y) then x(∂z)...

If `z= log""(x^2 + y^2)/(x+y) ` then `x(∂z)/(∂x)+ y(∂z)/(∂y)` is :

A

0

B

1

C

2

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
b
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PREMIERS PUBLISHERS-MODEL QUESTION PAPER -1-Part -IV
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  17. Let S=Q-(1) and is defined in S as a ** b =a+b-ab for all a,b, in G. V...

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  18. Let S=Q-(-1) and is defined in S as a ** b =a+b-ab for all a,b, in G. ...

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