If R = {(x,y); x,y ∈ Z, x^2 + y^2 ≤ 4} is a relation in set Z, then domain of R is :
If R = {(x,y); x,y ∈ Z, x2 + y2 ≤ 4} is a relation in set Z, then domain of R is :
(a) {0,1,2}
(b) {-2,-1,0,1,2}
(c) {0,-1,-2}
(d) {-1,0,1}
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