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skippenmydesig
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I need to prove that If 0<x<y and 0<a<b then ax<yb. I've been stuck going in circles for a while now and think I'm missing something really obvious.
Is there no list of axioms for real numbers in your book? The axioms that define the real numbers include division (by saying that every real number other than 0 has a multiplicative inverse). The axioms for addition and multiplication (including the one about multiplicative inverses) would typically be covered before the axioms that involve the order relation.skippenmydesig said:We have not defined division so I don't know for sure I could use y/x.
I found a simple proof of the theorem you're trying to prove that uses only 0<x<y, 0<a<b and the theorem I mentioned in the quote. I had to use the theorem more than once.Fredrik said:There's no axiom that says that you can multiply both sides of an inequality by a positive number. But it's easy to prove this theorem: For all a,b,c, if a<b and c>0, then ac<bc.
The purpose of proving this statement is to show that when two sets of numbers, (0,x) and (0,y), are multiplied by two other sets of numbers, (0,a) and (0,b), the product of the first set will always be less than the product of the second set. This can be useful in various mathematical and scientific applications.
The statement "0 The conditions "0 Yes, this statement can be proven using mathematical induction. Induction is a method of mathematical proof that involves proving that a statement is true for a specific case (usually the base case) and then showing that if the statement is true for that case, it must also be true for the next case. In this case, the base case would be when x=0 and a=0, and the next case would be when x>0 and a>0. Yes, this statement has many real-world applications. One example is in the field of physics, where it can be used to prove the relationship between the time and distance traveled by an object with a constant speed. It can also be used in economics to show the relationship between supply and demand, as well as in engineering for calculating the strength of materials under different loads and conditions.3. What is the significance of the conditions "0
4. Can this statement be proven using mathematical induction?
5. Are there any real-world applications for this statement?
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