Ответы и объяснения

2014-04-05T16:03:04+04:00
F''(x)=2ln(3x+1)* (ln(3x+1))' *=2ln(3x+1)*1/3x+1*(3x+1)'=2ln(3x+1)*1/3x+1*3=2ln(3x+1)*3/3x+1