what type of number is absolutely certain?
Mathematics is necessary in many fields, because of its ability to develop mathematical models that enable it to formulate a behavior or predict a possible behavior. The most popular fields that use mathematical models are the natural sciences, engineering, medicine, finance, and the social sciences. Applied mathematics led to entirely new mathematical disciplines, such as statistics, game theory, and optimal control. Mathematicians engage in pure mathematics without ever putting it into practice, but practical applications of what first began as pure mathematics are often discovered.
what type of number is absolutely certain?
… only how far a number is from zero:
“6” is 6 away from zero,
and “−6” is also 6 away from zero.
So the absolute value of 6 is 6,
and the absolute value of −6 is also 6
More Examples:
- The absolute value of −9 is 9
- The absolute value of 3 is 3
- The absolute value of 0 is 0
- The absolute value of −156 is 156
No Negatives!
So in practice “absolute value” means to remove any negative sign in front of a number, and to think of all numbers as positive (or zero).
Absolute Value Symbol
To show that we want the absolute value of something, we put “|” marks either side (they are called “bars” and are found on the right side of a keyboard), like these examples:
| |−5| = 5 | |7| = 7 |
Sometimes absolute value is also written as “abs()”, so abs(−1) = 1 is the same as |−1| = 1
what type of number is absolutely certain?
The absolute value of a number refers to the distance of a number from the origin of a number line. It is represented as |a|, which defines the magnitude of any integer ‘a’. The absolute value of any integer, whether positive or negative, will be the real numbers, regardless of which sign it has. It is represented by two vertical lines |a|, which is known as the modulus of a.