Question: PLZZZ HELP!!! LEVEL 4 ANSWER PLEASE KIND MATH EXPERTS !!!! BLESS 5. For security, a credit card number is coded in the following way, so
PLZZZ HELP!!! LEVEL 4 ANSWER PLEASE KIND MATH EXPERTS !!!! BLESS

5. For security, a credit card number is coded in the following way, so that it can be sent as a message. Subtract each digit from 9. (5 marks) a. Code the credit card number 3201 2342 3458 0931. b. A coded credit card number is 2341 0135 7923 0133. What is the original credit card number? c. Find f (@ ) if x represents a single input digit. What is the domain of f ( x) ? d. Determine f" () and its domain of f (:)
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