Question

найдите производную функции f(x)= x in x

Answer 1

f(x) ' = (x* sin(x) ) ' = sin(x) +x*cos(x)

Answer 2

f(x)=x*lnx такое?

f'(x)=x' lnx+xlnx'=lnx+x*1/x=lnx+1

 

 или 

f(x)=x*sinx 

f'(x)=sinx+x*cosx