on a pole, two reflectors located on the heights a and b, focus the same object on the ground. at what distance from the pole will the object be When is the angle forming light rays maximum?
On a pole, two reflectors located at heights a and b
focus on the same object on the ground.
At what distance from the pole will the object be
when the angle forming light rays is a maximum?
Hi everybody
If we have not any answers for critical points after first partial derivatives equal to zero, how can we continue to find local MAX, local MIN and Saddle point?. For example: Suppose we have below equations for first partial derivatives:
∂ƒ/∂x = y + 5 , ∂ƒ/∂y = 2z , ∂ƒ/∂z = y
As you can see, for ∇ƒ= 0 , there are not any answers (undefined)