Talk:06-240/Homework Assignment 1

What information should be included on the homework assignments besides the answers to the assignment? Is student name, Math 240, Homework Assignment 1 and date sufficient? MC

Yes. --Drorbn 14:50, 15 September 2006 (EDT)

Q4

i have a question on Q4. for the part a^-1=a^2, if it's true, then a*a^2=1, which makes a=1....but a can't be 1 right?

I don't see why [math]\displaystyle{ a*a^2=1 }[/math] implies [math]\displaystyle{ a=1 }[/math]. --Drorbn 06:16, 22 September 2006 (EDT)

because [math]\displaystyle{ b=a^{-1}=a^2 }[/math], if ab=1, why shouldn't [math]\displaystyle{ a*a^2=1 }[/math]?

But what's wrong with that? --Drorbn 17:16, 22 September 2006 (EDT)

if [math]\displaystyle{ a*a^2=1 }[/math], then a=1,but a field cannot have identical elements.....can it?