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The set {x:x € R,-2< x ≤ 7}can be writen as : (7, -2] (-2,7] (-2,7) [-2,7) |
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Answer» Answer: Transcribed image text: 9. -/100 points V EPPDISCMATH5 6.1.025. Let R; = < x € Rj1sx51+1 = 1,1+1 for each positive integer i. (ENTER your answers using interval notation.) (a) 9 UR;= ! " . (C) Are R1, R2, R3, ..., R, MUTUALLY disjoint? Explain. O YES, because no two of the sets R, R2, R2, ..., Ro have any elements in common, Yes, because the intersection of the sets Ry, Rz, R2, ..., R, is empty. Yes, because the union of the sets R1, R2, R2, ..., Rg is empty. • No, because the sets Rz, R2, R3, ..., R, are disjoint. No, because no two of the sets R1, R2, R2, ..., R, are disjoint. UR; = i = 1 |
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