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blagie [28]
3 years ago
14

Find the domain and range of these functions. a) the function that assigns to each pair of positive inte- gers the maximum of th

ese two integers b) the function that assigns to each positive integer the number of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 that do not appear as decimal digits of the integer c) the function that assigns to a bit string the number of times the block 11 appears d) the function that assigns to a bit string the numerical position of the first 1 in the string and that assigns the value 0 to a bit string consisting of all Os
Mathematics
1 answer:
IRISSAK [1]3 years ago
7 0

Answer:

See below

Step-by-step explanation:

a)

<u>Domain:</u> the cartesian product of integers ZxZ

<u>Range:</u> the integers Z, for every p in Z is the image of (p, p-1)

b)

<u>Domain:</u> the positive integers Z+

<u>Range:</u> the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} obviously, f(1)=9, f(12)=8, f(123)=7,...,f(123456789)=1 and f(1234567890)=0. So, every number in {0,1,...,9} is the image of some positive integer.

c)

<u>Domain:</u> all the bit strings. Since any real number can be written as a bit string in the binary system, the domain is actually the set R of real numbers.

<u>Range:</u> a bit string can have 0 or 1 or 2 or more blocks “11”, so the range is the set N of natural numbers including 0.

d)

<u>Domain:</u> all the bit strings (the real numbers as in c).  

<u>Range:</u> the natural numbers N plus 0

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