Many of you must have seen numerous examples of such situations where we get an absurd result and have to spot flaw in proof.
A famous one is the “algebraic proof of 1=0”
Here I came across a “Calculus based proof of 1=0” in A Mathematical Mosaic which I wanted to share with you.
It is based on “Integration by Parts” formula, which is:
So, the proof is of this form: