Online Course Discussion Forum

MC IB number theory

 
 
Picture of Yuyu Wei
MC IB number theory
by Yuyu Wei - Friday, April 3, 2020, 6:18 PM
 
In 6.3,I thought of another approach, but I don't know if it is correct. [23/3]+[23/2]-[23/6]=15,23-15=8.Answer is same,8.
 
Picture of David Reynoso
Re: MC IB number theory
by David Reynoso - Monday, April 6, 2020, 9:30 AM
 

You are correct. That would also be a way to find the number of irreducible fractions. (I think you mentioned it in class without the $[\,]$, but maybe you didn't hear me when I asked about it.)

Picture of Yuyu Wei
Re: MC IB number theory
by Yuyu Wei - Monday, April 6, 2020, 3:51 PM
 

Ok.Thank you!