
Equation of line passing through given points :
Let's proceed with two point form ~

Assume :




So, the equation of required line is : y = 3 ~
Answer:



Step-by-step explanation:
The given function is

We need to find first partial derivatives of the function.
Differentiate partially w.r.t. x and y, z are constants.


Differentiate partially w.r.t. y and x, z are constants.


Differentiate partially w.r.t. z and x, y are constants.



Therefore, the first partial derivatives of the function are
.
Answer:
225
Step-by-step explanation:
90 divided by 2 is 45, 45 times 5 is 225
First term = 2(1) - 3 = 2 - 3 = -1