Answer :

Here, relation R is defined on the set Z.


And R={(x,y) : x,yϵ Z,x2+y2≤4}


={(-2,0),(-1,0),(0,0),(1,0),(2,0),(0,-2),(0,-1),(0,1),(0,2),(1,1),(-1,-1),(1,-1),(-1,1)}


Now we know,Domain is the set which consist all first elements of ordered pairs in relation R.


So,Domain(R)={-2,-1,0,1,2}


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