54. (р^ (~(~рv @)) V (р^@) %3р
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Discrete math. Q49 is an example, and my question is Q54.
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- proof Lemma contrap : forall P Q : Prop, (P -> Q) -> (~Q -> ~P). use coqPlease don't do it for z=2, It's a trivial solution for z = 2 and getting the desire relation x = y + 1. But if z = 1 or (other natural numbers of z than can be prove later on) you will get y = 0, x = 1. But the problem is, 0 is not a natural number ℕ as stated in the problem. I am totally stuckLet P and Q be two conditions of the same type. Check any objects which cannotsatisfy P --> Q, or "none of the above" if none of the others are correct. (In other words, which are inconsistent with satisfying P --> Q) objects that falsify P objects that satisfy Q objects that falsify Q objects that satisfy P none of the above
- Prove number 2. Associativity only.In order to prove an quantificational argument invalid it is only necessary to find a quantificational model that shows it is possible for all the premises to be true and the conclusion false.A quantificational model specifies a universe (domain of discourse), which can be empty, can consist of a finite number of entities, or can consist of an infinite number of entitites. Further, it must specify the set of entities that satisfy every propositional function (both predicates and relations) used in the argument.Example: U = { 1, 2, 3, 4 }, P ( x ) (a predicate) = { 1, 2, 3 }, R ( x, y ) (a relation) = { ( 1, 1 ), ( 3, 2 ), ( 2, 3 ) }, and so on for every predicate and relation used in the argument.(Note: a valid quantificational argument is one in which the conclusion is true in all possible models in which all the premises are all true. Using this definition is rather daunting, which is why we use the rules of inference to show quantificational arguments are valid.)Prove the following…#15. In a recent study, 100 males used a weight loss supplement and 72 of them experience weight loss after two weeks. In the the same study 25 females used the same supplement and 15 of them experience weight loss after two weeks. Fill in the blanks below to make the most reasonable statement. The new weight loss supplement was less effective on ______ in the study. That is because only ____% of them, Lost way after two weeks, whereas ____% of the ______ lost weight after two weeks.