co-domain and range of R? Is this relation a function?

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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 ∈ N} What is the domain, co-domain and range of R? Is this relation a function?
13
Oct
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 ∈ N} What is the domain, co-domain and range of R? Is this relation a function? co-domain and range of R? Is this relation a function? Let N be the set of [...]
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Tags: co-domain and range of R? 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 , X , y ∈ N} What is the domain , y):y = 2x ,