Identifiers in a certain database language must begin with a letter, and then [he letter may be followed by other characters, which can be letters, digits, or underscores (_). However, 82 keywords lull consisting of 15 or fewer characters) are reserved and con not be used as identifiers. How many identifiers with 30 or fewer characters are possible? (Write the answer using summation notation and evaluate it using a formula from Section 3.2.)
The number of identifiers with or fewer characters andwrite the answer using summation notation and evaluate it using the formula.
In a certain database first character must be alphabet then followed by other characters which can be digits, letters or underscores (_). There are total characters and keywords are reserved.
The following will be the summation notation for the above statement-
The summation from to of will be the sum of all terms , so the compact as well as the summation form can be written as follows-
Now let us try to form the summation formula of the problem
Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!Get Started