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(Solved): 1. Find the first order partial derivatives: z=ln(x+x2+y2) 2. Find the gradient of the function ...

$1. Find the first order partial derivatives: \[ z=\ln \left(x+\sqrt{x^{2}+y^{2}}\right) \] 2. Find the gradient of the functi$

1. Find the first order partial derivatives:

z = ln (x + x^{2} + y^{2})

2. Find the gradient of the function

f (x, y) = ln (x^{2} + y^{2})

at the point

(1, 1)

.

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1) z=ln?(x+x2+y2)Now,?z?x=??xln?(x+x2+y2)??z?x=1x+x2+y2×(1+

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