Question

What is the difference between a formal and informal proof? (Please give explanations)

A) A formal proof uses a table or a list of steps, whereas an informal proof uses paragraphs.

B) A formal proof provides the reasons for steps, whereas an informal proof does not.

C) A formal proof is much shorter, whereas an informal proof is longer.

D) A formal proof uses equations, whereas an informal proof only uses text.

Answers

  1. The difference between a formal and informal proof in arithmetics is that a formal proof uses equations, whereas an informal proof only uses text. That is option D.

    What is formal and informal proof?

    A formal proof is defined as the concept used in arithmetics to show that the final answer to an expression obeys a particular rule of an equation or formula.
    An informal proof is defined as the concept that shows the answer to a mathematical expression without the use of formula or derived equation.
    Therefore, the difference between the formal and informal proof is that a formal proof uses equations, whereas an informal proof only uses text.
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