Finding an error of integration by parts

[Mr. Ne Ed help]

Hello. I need help on this word/solving problem. The question wanted me to find an error. Here is what it's looks like.


Find the error “Setting u = 1/x and dv = dx, integration by parts gives

int (1/x)dx = x(1/x) - int x(-(1/x^2))dx = 1 + int (1/x)dx

so, subtracting the integral on both sides, 0 = 1”.


I was staring at the question for more than 20 mins and still no clue. Please help. Thanks.

 

[stapel]

See if this helps:

Mudd Math Fun Facts: One Equals Zero: Integral Form

Eliz.