Question

The set of all numbers less than or equal to -1.

Answer 1

Answer:

anything before -1 is lower than -1.  -1 = -1

Step-by-step explanation:

-10, -9, -8, -7, -6, -5, -4, -3, -2 etc. are in a sense before -1 on a time line and they are all less than -1

Answer 2

Set B represents the set of all the natural numbers less than or equal to -1

$\rm B=\{-\infty ...........-4,-3,-2,-1\}$

if we include all the numbers the range of set includes every number from

$\rm -\infty \; to -1$ so the set is represented by K

$\rm K = \{ -\infty ,.....-1\}$

In Mathematics a set is  a collection of objects/elements that are constrained by some particular condition.

Let us consider a situation where "S" is the set and the elements are represented by "x"

A set is always denoted in curly braces. Expression (1) represents the set

$\rm S =$ { $\rm x_1.x_2,x_3, x_4,x_5........x_n$}...........(1)

Set S  has elements that are represented as $\rm x_1$$\rm\\where \; i \; represents\; the\; index\; of \; the \; element\\n = number\; of \; elements \; in \; the \; set \; x$

The set of all the natural numbers less than or equal to -1 is the set of all the negative integers including  -1.

So let us say B represents the set of all the natural numbers less than or equal to -1 . Then we can write it as follows

$\rm B=\{-\infty ...........-4,-3,-2,-1\}$

Set B represents the set of all the natural numbers less than or equal to -1

if we include all the numbers the range of set includes every number from

$\rm -\infty \; to -1$ so the set becomes  

$\rm K = \{ -\infty ,.....-1\}$

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