- #1
juice34
My question is how do they transform equation A. into B.. I know they are using the product rule but dont know what is going on.
EQ A.)D(1/r^2)d/dr(r^2(dC/dr))-kC=0
now how do they get Eq B.
EQ B.) (d^2C/dr^2)+(2/r)(dC/dr)-(kC)/D=0
EQ A.)D(1/r^2)d/dr(r^2(dC/dr))-kC=0
now how do they get Eq B.
EQ B.) (d^2C/dr^2)+(2/r)(dC/dr)-(kC)/D=0