Let `f={(x, y)|x, yin N and y=2x}` be a relation on N. Find the domain, co-domain and range. Is this relation a function?

Let N be the set of natural numbers and the relation R be defined on N such that R={(x,y): y=2x,x,y in N }. what is the domain codomain and range of R ? Is this relation a functions ?

find the domain and range of the following real functions f(x ) =-|X|

find the domain and range of the real function f(x) = sqrt(9 -x^2)

Find the domain and range of the function f(x)=(1)/sqrt(x-5)

Find the domain and range of f(x)=sqrt(3-2x-x^2)

Find the domain and range of f(x)=sqrt(x^2-4x+6)

Find the domain and range of f(x)=sqrt(4-16x^(2)) .

Find the domain and range of the function f(x)=(x^(2)-9)/(x-3)

Consider the real function f(x ) = ( x+2)/( x-2) find the domain and range of the function

If R_(1)={(x,y)|y=2x+7, where x in R and -5 le x le 5} is a relation. Then find the domain and Range of R_(1) .