# What was the first Internet company?

ARPANET

ENIAC machine

## Why is 6 a rational number?

6 is a rational number because it can be expressed as the quotient of two integers: 6 ÷ 1.

## What is called real number?

The real numbers include all the rational numbers, such as the integer −5 and the fraction 4/3, and all the irrational numbers, such as √2 (1.41421356…, the square root of 2, an irrational algebraic number). Included within the irrationals are the real transcendental numbers, such as π (3.14159265…).

## What is R * in math?

In mathematics, the notation R* represents the two different meanings. In the number system, R* defines the set of all non-zero real numbers, which form the group under the multiplication operation. In functions, R* defines the reflexive-transitive closure of binary relation “R” in the set.

## What does Z mean in math?

Integers. The set of integers is represented by the letter Z. An integer is any number in the infinite set, Z+ is the set of all positive integers (1, 2, 3.), while Z- is the set of all negative integers (…, -3, -2, -1).

real numbers

## What does the R mean in Algebra 2?

R = real numbers, Z = integers, N=natural numbers, Q = rational numbers, P = irrational numbers.

## What does R mean in functions?

For example, when we use the function notation f:R→R, we mean that f is a function from the real numbers to the real numbers. In other words, the domain of f is the set of real number R (and its set of possible outputs or codomain is also the set of real numbers R).

## What does the R in Photomath mean?

ve been working so hard that you