Write a function that triples a number

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Given the following
<F1WAE> ::- <num>
| {+ <F1WAE> <F1WAE>}
| {with {<id> <F1WAE>} <F1WAE>}
| <id>
| {<id> <F1WAE>}
(define-type FIWAE
[num (n number?)]
[add (Lhs F1WAE ?) (rhs F1WAE?)]
[with (name symbol?) (named-expr F1WAE?) (body FiWAE? )]
[id (name symbol?)]
[app (fun-name symbol?) (arg FlWAE?)])
Write a function that triples a number
Transcribed Image Text:Given the following <F1WAE> ::- <num> | {+ <F1WAE> <F1WAE>} | {with {<id> <F1WAE>} <F1WAE>} | <id> | {<id> <F1WAE>} (define-type FIWAE [num (n number?)] [add (Lhs F1WAE ?) (rhs F1WAE?)] [with (name symbol?) (named-expr F1WAE?) (body FiWAE? )] [id (name symbol?)] [app (fun-name symbol?) (arg FlWAE?)]) Write a function that triples a number
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