Prove that Yational numbers la b) with equality multiplication and addition defined as Set s of ordered pair of to li) laib)= (cod) if ac, b=d (a,b)+ (c,d) = la,b).(6.d)- (ac, bd) forms. Also domain- Cata, btd) %3D that it not an integsal. is

Q: WOW THANKS! Can you help with question 18 too? I realized I already answered 20 after i sent it

A: Here is the solution:

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