Need Help
- Thread starter PzyMax
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Can you look at a list of ingredients for your favorite dessert, compare the list to what you have on hand, and create a grocery list for your next shopping trip?
"im really bad at math." codswallop
Yes, we can answer the questions. It's time for you to stop believing you can't do it and start giving it a go. You can't break it.
Please show us #1. You have only "U" to consider.
B: Which, if any, of the numbers 0, 1, 2,...9 are odd?
C: Which, if any, of the numbers 0, 1, 2,...9 are prime?
etc...
A large part of math is just learning to read and write in the international language of math. A smaller part of math is learning the meaning of some technical terms in English.
How do you translate [MATH]U = \{0,\ 1,\ 2,\ 3.\ 4,\ 5,\ 6,\ 7,\ 8,\ 9\}[/MATH] into English?
It means that I am calling the collection of decimal digits U. It is just a naming statement. Nothing complex or subtle about it. Of course, after you translate, you do have to know that what the English phrase "decimal digit" denotes for the statement to make sense
What does [MATH]B = \{x| \ x \text { is odd}\}[/MATH] mean in English?
It means that I am calling B the collection of things, each of which is an odd [number].
That calls for a little more than just translation. It also requires that you know what the mathematical meaning of the English phrase "odd number" is.
So how would you translate [MATH]C = \{x| \ x \text { is prime}\}[/MATH]
Do you know what a prime number is?
Now you are right to be a bit confused by this question because B, C, and E are infinite sets, and, unless you are amazingly patient, you probably will give up before you finish listing the items in even one of them. The question is BADLY POSED. What is almost certainly suggested by the formatting is:
[MATH]B = \{x| \ x \text { is a member of set } U \text { and } x \text { is odd}\}.[/MATH]
Assuming that is what the idiot who wrote the question meant, can you answer part 1?
How do you translate [MATH]U = \{0,\ 1,\ 2,\ 3.\ 4,\ 5,\ 6,\ 7,\ 8,\ 9\}[/MATH] into English?
It means that I am calling the collection of decimal digits U. It is just a naming statement. Nothing complex or subtle about it. Of course, after you translate, you do have to know that what the English phrase "decimal digit" denotes for the statement to make sense
What does [MATH]B = \{x| \ x \text { is odd}\}[/MATH] mean in English?
It means that I am calling B the collection of things, each of which is an odd [number].
That calls for a little more than just translation. It also requires that you know what the mathematical meaning of the English phrase "odd number" is.
So how would you translate [MATH]C = \{x| \ x \text { is prime}\}[/MATH]
Do you know what a prime number is?
Now you are right to be a bit confused by this question because B, C, and E are infinite sets, and, unless you are amazingly patient, you probably will give up before you finish listing the items in even one of them. The question is BADLY POSED. What is almost certainly suggested by the formatting is:
[MATH]B = \{x| \ x \text { is a member of set } U \text { and } x \text { is odd}\}.[/MATH]
Assuming that is what the idiot who wrote the question meant, can you answer part 1?
Last edited:
Steven G
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U, the universal set, is the set of all things that exist for this problem. There is no vanilla ice cream as it is not in the set U. There is no number 10. There is no color television. There is however the number 4.
W={x| x is more than 6}, for example, is the set of all numbers more than 6 (remember we only have the elements in the set U to work with) which is {7, 8, 9}
Now try some of these.
W={x| x is more than 6}, for example, is the set of all numbers more than 6 (remember we only have the elements in the set U to work with) which is {7, 8, 9}
Now try some of these.