Answer:
X∈R
and
f'(x)=0
Explanation:
Find the domain:
f(x)=-2×1
The domain of a constant function is the set of all Real numbers.
x∈R
Find the derivative:
f(x)=-2×1
Find the derivative of the function.
f'(x)=[tex]\frac{d}{dx}[/tex](-2×1)
Any expression multiplied by 1 remains the same.
f'(x)=[tex]\frac{d}{dx}[/tex](-2)
The derivative of a constant is always 0.
f'(x)=0
