## Math Basics## All About Numbers |

## What are non-vanishing and vanishing numbers? |

A non-vanishing number is just as the term implies: A quantity that is non-zero everywhere. For example, in the expression *x ^{4}* + 1, the answer will never be zero (even when

*x*is zero or a negative number). The answer for the expression

*x*is called “vanishing” because if

^{2}*x =*0, the expression’s answer “vanishes” to zero.