How that if the vector field F = Pi + Qj + Rk is conservative and P, Q, R have continuous first-order partial derivatives, then the following is true.
∂P/∂y = ∂Q/∂x = ∂P/∂z = ∂R/∂x = ∂Q/∂z = ∂R/∂y.
Since F is conservative, there exists a function f such that F = ∇f, that is, P, Q, and R are defined as follows. (Enter your answers in the form fx, fy, fz.)

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here