Let f(x, y) = √xy.

Suppose you are asked to find the value of at a

af

𐐀х

number of points.

For which of the following points you will have to use

the limit definition of partial derivative?

a. (6,6)

O True

False

[1 point]

b. (0,0)

O True

O False

[1 point]

c. (6,0)

O True

False

[1 point]

d. (0,6)

O True

O False

[1 point]