Answer:
N(4) = 4
Step-by-step explanation:
The given function is N(u) = 4, where N is the function and u is the independent variable.
Now, the value of the function N(u) is a constant and independent of u variable.
Therefore, for each and every value of the variable u the N(u) will be 4 and this is a constant function.
Hence, N(4) = 4 ( Answer )
