How can greed be good and what are some examples ?
How do I find -LSB- math -RSB- f -LRB- 72 -RRB- -LSB- / math -RSB- given that -LSB- math -RSB- \ sum _ -LCB- d | n -RCB- f -LRB- d -RRB- = 2n ^ 2 -LSB- / math -RSB- for all -LSB- math -RSB- n \ in \ mathbb -LCB- N -RCB- -LSB- / math -RSB- ?