Mathematics, 08.08.2019 00:20, cathydaves

Consider the theorem and its proof below. theorem: if the product of two positive real numbers is greater than 25, then at least one of the numbers is greater than 5. proof: for all positive real numbers a and b, if a s5 and b 5, then ab 25. if a s 5, then ab 5b. since b 55, then ab 25. therefore, if ab > 25, then a > 5 or b> 5. is the proof valid, and which type of proof is used? the proof is valid, and it is a direct proof. the proof is not valid, and it is proof by contrapositive. the proof is valid, and it is proof by contrapositive. the proof is not valid, and it is a direct proof.

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:30, lzrd3rik

896.31 cm= km 100cm = 1m 1000m = 1km a) 0.0089631 b) 0.0089631 c) 8.9631 d) 89.631

Answers: 2

continue

Mathematics, 21.06.2019 20:00, guccim5971

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

Answers: 1

continue

Mathematics, 21.06.2019 21:00, Cocco

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day

Answers: 1

continue

Mathematics, 22.06.2019 00:30, dcttechgames

Simplify the given expression leaving the answer in improper fraction form. 2/3+5/6

Answers: 2

continue

Do you know the correct answer?

Consider the theorem and its proof below. theorem: if the product of two positive real numbers is g...