Which of the following structure is not a binary structure? حقر أحد الخبارات bo (R',+) * None of these
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Q: Which of the following structure is not a binary structure? إختر أحد التبارات .a O (@'.+) (0', -) **…
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- Suppose that the check digit is computed as described in Example . Prove that transposition errors of adjacent digits will not be detected unless one of the digits is the check digit. Example Using Check Digits Many companies use check digits for security purposes or for error detection. For example, an the digit may be appended to a -bit identification number to obtain the -digit invoice number of the form where the th bit, , is the check digit, computed as . If congruence modulo is used, then the check digit for an identification number . Thus the complete correct invoice number would appear as . If the invoice number were used instead and checked, an error would be detected, since .show that the binary structures {Q,+} with {Q,+} where (x)=x/2 for xEQ are isomorphicShow that U22 is cyclic. Find all of the generators of U22 and explain how you know that each element is indeed a generator.
- b, c, a, or no generator, since it is not cyclic?Is the chain irreducible? Find the period of each essential state. Verify that essential states that belong to the same communication class have the same period Are there any aperiodic communication classes?Let D be a set of size n>0. Explain why there are exactly 2^n binary relations on D that are both symmetric and antisymmetric.
- How many rotational symmetries does this figure have?A string that contains only Os, 1s, and 2s is called a ternary string. How many ternary strings of length 9 start with a "2" and end with a "1" but don't have a "0" in the third position?Quen: An ant farm contains both red and black ants. A particular passage in the farm is so narrow that only 1 ant can get through at a time. If 4 ants follow each other through the passage, how many different color patterns (having 4 elements) could be produced (assuming that red ants are indistinguishable from one another, as are black ants)?
- Consider the structure (Z+, ∗) of the positive integers with multiplication.How many strings of length 9 over the alphabet {a, b, c} are there which contain at least seven consecutive a’s? Hint: Upon writing down a few such strings you will notice that they must take one of three distinct forms (depending on where the consecutive a’s are). Then use the inclusion–exclusion principle.Suppose a password for a computer system must have at least 7 but no more than 11 characters where each charcter in the password is a lower case English letter, an uppercase English letter, a binary digit, or a special character (*, >, <, !, +, =, $). How many passwords contain at least one of the seven special characters?