NotASmurf Messages 150 Reaction score 2 Thread starter Apr 8, 2015 #1 Hey all, I'm not understanding why the bits highlighted in red are equal? Any help appreciated, thanks. Attachments Qcalc.png 16.7 KB · Views: 586
Hey all, I'm not understanding why the bits highlighted in red are equal? Any help appreciated, thanks.
phyzguy Science Advisor Messages 5,318 Reaction score 2,403 Apr 8, 2015 #2 It's just the product rule for derivatives, d(a*b) = da*b + a*db.