what is inderect proof???

Question

anonymous · Answer

you accidentally proved something?

anonymous · Answer

Indirect proof is a type of proof in which a statement to be proved is assumed false and if the assumption leads to an impossibility, then the statement assumed false has been proved to be true.

anonymous · Answer

Sometimes, instead of showing that a statement is true, we show that the opposite statement is false.

anonymous · Answer

A)Indirect proof requires you to prove that all but one of a set of possible alternatives is true.
B)Indirect proof requires you to prove that all possible alternatives is false
C)Indirect proof requires you to prove that all but one of a set of possible alternatives is false
D)Indirect proof requires you to prove that all possible alternatives is true.
which one?