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let-x-y-N-2-x-y-n-n-N-find-card-2-let-A-x-y-N-2-x-2y-n-find-card-A-




Question Number 31047 by abdo imad last updated on 02/Mar/18
let Δ={(x,y)∈N^2  /x+y=n , n∈N} find cardΔ  2) let A= {(x,y)∈N^2 / x+2y=n} find card A.
letΔ={(x,y)N2/x+y=n,nN}findcardΔ2)letA={(x,y)N2/x+2y=n}findcardA.

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