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# What is the mathematical symbol of a belongs to both sets x and y

• Réponse publiée par: nelspas422

a = x + y

Step-by-step explanation: let a be the first letter of the alphabet. Equate them to the expression x + y.

• Réponse publiée par: Rosalesdhan

Step-by-step explanation:

• Réponse publiée par: 123gra

2,3,and 5 are the wrong ones

Step-by-step explanation:

• Réponse publiée par: snow01

Hi! I can't type the fancy forms of R, Q, Z, and other groups, but I hope you understand what I mean by them.

5 is an integer

5 ∈ Z

This shows that 5 is an element (∈) of the set of integers (Z)

Y is a multiple of 10

Y = 10k, k ∈ Z

This means that Y = 10 x k, where k is an integer, which is the definition of a multiple.

A belongs to both sets x and y

We can use A ∈ (x ∩ y). [A is in the intersection of x and y, which means it belongs to both of them]

We can also use (A ∈ x) ∧ (A ∈ y). The ∧ means "and", so this reads as "A is in x and A is in y".

The values of y range feom -4 to 5

-4 ≤ y ≤ 5

The square of the difference of x and y is not more than 10

(x-y)² ≤ 10

Notice that "not more" translates to "less than or equal to", and not just "less than", since the square of the difference could be equal to 10.

The square of a number is positive

x² > 0

Positive translates to "> 0". Interestingly enough, this statement is FALSE. Since x could be 0, x^2 could be 0, which is not positive.

8 is an even number

An even number means that it is a multiple of 2, so similar to earlier,

8 = 2k, k ∈ Z

7 is an odd number

Odd numbers are just even numbers + / - 1, so we use:

7 = 2k + 1, k ∈ Z

1/4 is a rational number

The set of rational numbers is Q, so

1/4 ∈ Q

Hope this helps!

• Réponse publiée par: shannel99
A = x+y

No explanation.
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