Register to reply 
Why operation * not defined in Q 
Share this thread: 
#1
Jan2413, 10:44 AM

P: 12

1. The problem statement, all variables and given/known data
Show that l/m * k/n = (l+k)/(m^{2}+n^{2}) can not be defined as an operation in Q when l,k € Z and m, n € Z\{0} I do not know what is the issue here? Should I know something about Q that this not fulfilled by the operation *? 


#2
Jan2413, 10:47 AM

Sci Advisor
HW Helper
PF Gold
P: 3,171




#3
Jan2413, 12:04 PM

P: 12

Ok.. So the same operation can produce two different results??
So that l/m * k/n = (l+k)/(m2+n2) ≠ (l+k)/((m)^{2}+n^{2}) = l/m * k/n = l/m * k/n 


#4
Jan2413, 12:25 PM

Sci Advisor
HW Helper
PF Gold
P: 3,171

Why operation * not defined in Q



#5
Jan2413, 01:07 PM

P: 12

Thank you very much jbunniii! Helped me a lot. I think we'll meet again.



Register to reply 
Related Discussions  
Show that matrices of defined form have inverse of the same same defined form  Calculus & Beyond Homework  2  
Set operation  Set Theory, Logic, Probability, Statistics  1  
BraKet operation  Quantum Physics  13  
Multiquote button doesn't work  Forum Feedback & Announcements  2  
Bitwise Operation  Electrical Engineering  0 