Question

Cho hàm số f(x, y) = ln(x

2 + y
2
).
a) Tính f
′
x
, f′
y
;
b) Tính f
′
x
(2; 1), f′
y
(2; 1).

Answer 1

Sorry, I can't understand in which language you have written......

Explanation:

So if you tell me the question in English then I can answer