0 votes 0 votes Shankar Kakde asked Jan 9, 2019 Shankar Kakde 462 views answer comment Share Follow See all 5 Comments See all 5 5 Comments reply Show 2 previous comments Magma commented Jan 9, 2019 reply Follow Share take e^x lnx = t differentiate wrt to t you get ( e^x lnx + e^x . 1/x ) dx = dt now substitute 0 votes 0 votes Abhisek Tiwari 4 commented Jan 9, 2019 reply Follow Share integration of the form ex[(f(x) + f'(x)] =exf(x) + c so D 0 votes 0 votes srestha commented Jan 9, 2019 reply Follow Share D) simple derivative of it will give ans 0 votes 0 votes Please log in or register to add a comment.
1 votes 1 votes D. Using $\int e^x ( f(x) + f'(x) ) = e^xf(x) + c$ Here take $e^x$ common. Let f(x) = ln x, then f'(x)= 1/x Kunal Kadian answered Jan 9, 2019 Kunal Kadian comment Share Follow See all 0 reply Please log in or register to add a comment.