Let I denote the interval [0,oo). For each r as an element of I, define
A={(x,y)element of RxR:x^2+y^2=r^2}
Determine U and(INTERSECTION)A
What would the set be?
A={(x,y)element of RxR:x^2+y^2=r^2}
Determine U and(INTERSECTION)A
What would the set be?