Question

21
which of the following types of statement cannot be used to explain the steps of a proof? check all that apply
postulate
theorem
guess
conjecture

Explanation:

In mathematical proofs, a postulate is an accepted statement without proof, a theorem is a proven statement, both can explain proof steps. A guess is an unsubstantiated assumption, and a conjecture is a proposed statement without proof (not yet a theorem), so they can't be used to explain proof steps as they lack the necessary validity or proof.

Answer:

C. Guess, D. Conjecture