a.) What is the order of any non trivial subgroup of B? b.) What are the trivial subgroups of B? c.) How many nontrivial subgroups does B have? d.) What is the generator of group B?
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a.) What is the order of any non trivial subgroup of B?
b.) What are the trivial subgroups of B?
c.) How many nontrivial subgroups does B have?
d.) What is the generator of group B?
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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 .Construct a binary operation ♦ on {a, b, c} that is commutativeSuppose 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?
- Suppose each license plate in a certain state has four letters followed by two digits. The letters I , O , Q , and U and the digits 0 , 1 , 2 , and 3 are not used. So, there are 22 letters and 6 digits that are used. Assume that the letters and digits can be repeated. How many license plates can be generated using this format? licenseplatesSuppose each license plate in a certain state has two digits, followed by two letters, followed by two digits. The letters Q and U are not used. So, there are 24 letters and 10 digits that are used. Assume that the letters and digits can be repeated. How many license plates can be generated using this format? licenseplatesA burger chain wants to send codes for a free small drink to the members of its kids club. The coupon code will have one letter, followed by two digits, followed by two letters. The letters R , S , T , and U and the digit 3 will not be used. So, there are 22 letters and 9 digits that will be used. Assume that the letters and digits can be repeated. How many such coupon codes can be generated?
- 12 To gain access to his account, a customer using an automatic teller machine (ATM) must enter a four-digit code. If repetition of the same four digits is not allowed (for example 5555), how many possible combinations are there? possible combinationsSuppose each license plate in a certain state has four letters followed by two digits. The letters I, O, Q, and U and the digits 0,1, 2, and 3 are not used. So, there are 22 letters and six digits that are used. Assume that the letters and digits can be repeated. How many license plates can be generated using this format.Draw a circuit diagram corresponding to the following Boolean expression:
- 6. An oil company is going to issue new ID codes to its employees. Each code will have one letter, followed by one digit, followed by three letters. The letters W, X, Y, and Z will not be used. So, there are 22 letters and 10digits that will be used. Assume that the letters can be repeated. How many employee ID codes can be generated?Suppose B is a set containing two distinct element called 0 and 1: suppose there are defined on B two binary operation.Which shall be done by + and * and a unary operation denoted by / .Then B is called a Boolean algebra if five pairs of lwas hold for all members x, y and z in B . State the five pairs of law and write their mathematical expressions .Suppose a password for a computer system must have at least 7, but no more than 11 characters where each character in the password is a lower case English letter, an uppercase English letter, a binary digit, or one of seven special characters (*,>,<,!,+,-,$) How many of these passwords contain at least one occurrence of at least one of the seven special characters?