Question: Let A and B be finite sets. Find a general formula for | A - B | . Sketch the following subsets of R 2

Let A and B be finite sets. Find a general formula for |A-B|.
Sketch the following subsets of R2(RR) :
a){(x,y)inR2|x2+y2=5}
b){(x,y)inR2||x-y|1}
c)[2,4][-1.3]
List all elements of ({a,b,c}{b,c,d,e,f}){g,h}.
Let A and B be finite sets. Find a general

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