Question

What does f(x)=y mean?

Answer 1

$\huge{He¥ MaTe!!!}$

☆☞ Here is ur answer ☜☆

✔✔ Assume we have a function f(x,y) of two variables like f(x,y) = x2 y. The partial derivative fx is the rate of change of the function f in the x direction.

✔✔ We also can see that xx means: it is positive if the surface is bent concave up in the x direction and negative if it is bent concave down in the x direction.

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