What is the surface area of the solid created by revolving #f(x) = 1/(x+e^x) , x in [3,4]# around the x axis?
the surface area produce from revolving =volume
these is the sketch of function
these is the are area wanted to calculate between x=3 and x=4
the volume produced from revolving the surface area between x=3 and x=4 is calculated by ;
Then complete the steps normally.