. Applying some basic identity transformations, we get:
With such a proof, we can show that
1=2, pi=E, 10000000000000=1, etc.... Can you spot the flaw?
The step 4 is obtained by dividing both sides of the step 3 by a-b.
However, in tems of the first step, a=b.
So, in reality we are dividing both sides of step 3 to obtain step 4.
This division by zero is not permissible and accordingly, this is a contradiction.