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ch4aika [34]
3 years ago
15

15. Given A (X) define the characteristic function A : X {0, 1} by Suppose that A and B are subsets of X. (i) Prove that the fun

ction x A(x) B(x) (multiplication of integers) is the characteristic function of the intersection A B. (ii) Find the subset C whose characteristic function is given by

Mathematics
1 answer:
il63 [147K]3 years ago
4 0

Answer:

Step-by-step explanation: Step explained in the attached file

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How many lots of 10 second are there in 10 minutes
Vlad [161]

Answer:

60

Step-by-step explanation:

We can easily solve this by finding out how many 60 seconds are in 10 minutes, and then dividing by 10.

To do that, multiply 60 seconds by 10, since there are 60 seconds in each minute.

60*10=600. There are 600 seconds in ten minutes.

Now, divide by 10.

600/10=60

There are 60 intervals of 10 seconds in 10 minutes.

Hope this helps!

7 0
3 years ago
How do I prepare for the PSAT? Every time I take a practice test, I get stuck on a problem that is within my topic range, but fo
melamori03 [73]

Answer:

Maybe you can have someone read it to you to see if you can answer it that way after you answer it on your own a cupple of times

Step-by-step explanation:

8 0
3 years ago
How many different four lettered codes can be formed if the first letter must be an S or a T
emmainna [20.7K]

Answer:

27,600

Step-by-step explanation:

We use the following formula:-  

Number of permutations of r from n

= nPr

= n! / (n-r)!

I am assuming you don't allow repeated letters in the 4 letter codes.

Take S as the first letter. Then we have 3 letters extra out of 25 letters.

Using the above formula the possible ways of doing this is

25! / (25 - 3)!

25! / 22!

= 25*24*23

= 13800.

The same number is obtained if the first letter is a T.

So the answer is 2*13800

= 27,600

8 0
3 years ago
What is the mean of 4,6,8,20, 12?
Delvig [45]

Answer:

add them all up which is 40 then divide by the amount of numbers there are. in this case 5, so 40 ÷ 5 = 8

6 0
3 years ago
Read 2 more answers
A number is not an integer what type of number can it be
MrRa [10]
It can be a decimal or fraction. An integer HAS to be a whole number.
-2, 10, and 4300 are integers
8.4, -0.14568, and 1/2 are not integers
8 0
3 years ago
Read 2 more answers
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