Online Course Discussion Forum

Help on 6.30 II-A

Help on 6.30 II-A
YangBober - 2021年01月23日 Saturday 15:28

I need some hint on the proof


Re: Help on 6.30 II-A
ZhangCharles - 2021年01月23日 Saturday 20:25
Hint: Try using symmetry to make the summation look a little nicer, and write an equation equal to 0 and try looking back on lecture (or your book) on how to turn it into an equation.  (6.6d, perhaps?)