How to express these phrases mathematically

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In summary, we can express these statements in symbolic logic as follows:- There exists an integer multiple of all other integers: $$\exists zn : z \in ℤ$$- Any real number has a square root in the set of real numbers: $$\forall r \in ℝ \exists \sqrt{r} \in ℝ$$- Not all real numbers are integer quotients: $$\forall r \in ℝ \nexists \frac{a}{b} : \frac{a}{b} \not\in ℤ$$- Some real numbers are strictly greater than their square: $$\exists r \in ℝ : r > r^2$$
  • #1
math.exo
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look at this phrase :

'il existe un entier multiple de tous les autres' : there is an integer multiple of all other

'tout réel posséde une racine carrée dans IR ':any real has a square root in IR

'tout les réels ne sont pas des quotients d'entiers': any real (any actual) are not integer quotients

'certains réels sont strictement supérieurs à leur carré ':some real are strictly above their square

I need to write it on mathematical form.
 
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  • #2
I imagine you want to use symbolic logic? Still, your second sentence is wrong , in case that matters.
 
  • #3
math.exo said:
'il existe un entier multiple de tous les autres' : there is an integer multiple of all other

## \exists zn : z \in ℤ ## (all other what?)

math.exo said:
'tout réel posséde une racine carrée dans IR ':any real has a square root in IR

## \forall r \in ℝ \exists \sqrt{r} \in IR ## (what is IR in this context?)

math.exo said:
'tout les réels ne sont pas des quotients d'entiers': any real (any actual) are not integer quotients

## \forall r \in ℝ \nexists \frac{a}{b} : \frac{a}{b} \not\in ℤ ##

math.exo said:
'certains réels sont strictement supérieurs à leur carré ':some real are strictly above their square

## \exists r \in ℝ : r > r^2 ##
 
  • #4
I would say : $$\exists m\in\mathbb{N}:k|m\forall k\in\mathbb{N}$$

The second i don't understand what IR is.

The third : $$\exists x\in\mathbb{R}:x\neq \frac{a}{b} \forall a,b\in\mathbb{Z}$$
 

What does it mean to express something mathematically?

To express something mathematically means to use mathematical symbols, equations, and operations to represent a concept or idea.

What are some common mathematical symbols used in expressions?

Some common mathematical symbols used in expressions include the plus sign (+), minus sign (-), multiplication sign (x or *), division sign (/), and the equal sign (=).

How do you translate a phrase into a mathematical expression?

To translate a phrase into a mathematical expression, you first need to identify the key words or operations in the phrase. Then, you can use mathematical symbols and equations to represent those words and operations.

What is the difference between an expression and an equation?

An expression is a combination of numbers, symbols, and/or variables that represents a mathematical phrase, while an equation is a statement that shows the equality of two expressions.

What are some strategies for simplifying and solving mathematical expressions?

Some strategies for simplifying and solving mathematical expressions include using the order of operations, combining like terms, and substituting values for variables. It can also be helpful to break down an expression into smaller parts and to use visual aids or diagrams.

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