Question

prove that 1=2 against mathematics method

Answer 1

Of course 1=2 can never be mathematically correct. But there are these little things, called mathematical fallacies, which lead to absurd (and incorrect) results; through some subtle, not apparent at first glance, intricacy in the proof. For instance, division by zero, which was demonstrated by Mayank Gulati's answer. The closest one can ever come to 1=2 is through these fallacie