QAMath › What does an exclamation mark mean in math?
Q

What does an exclamation mark mean in math?

A

The exclamation mark in math is used in permutation to indicate factorials. When the exclamation mark is used in front of a positive integer, it means that one should find the product of the integers from the positive integer to the number 1. For example, 2! equals 2 times 1.

5 months ago
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