Exam 2021, Problem 3, Question 4 by Joel Rudsberg - Sunday, 30 January 2022, 16:27 Number of replies: 1 In the exam 2021, Problem 3, Question 4, how does the solution perform the second equality (where the numerator becomes p+w)?Thanks Permalink Reply In reply to Joel Rudsberg Re: Exam 2021, Problem 3, Question 4 by Seyed Mohammadhossein Tabatabaee - Monday, 31 January 2022, 09:11 Hello, Thank you for your question. With a bit of work, you could prove that if a/b = c/d then a/b = c/d = (a+b)/(c +d); the second equality is obtained using this fact. Best, Hossein Permalink Show parent Reply
In reply to Joel Rudsberg Re: Exam 2021, Problem 3, Question 4 by Seyed Mohammadhossein Tabatabaee - Monday, 31 January 2022, 09:11 Hello, Thank you for your question. With a bit of work, you could prove that if a/b = c/d then a/b = c/d = (a+b)/(c +d); the second equality is obtained using this fact. Best, Hossein Permalink Show parent Reply