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- ;autor: Yilber Alexander Viscue
- ;contrato: buscar-simbolo lista simbolo --> booleano
- (define listas (cons 'a (cons 'b (cons 'c (cons 'd (cons 'e empty ))))))
- (define (buscar-simbolo lista sim)
- (cond
- [(equal? (first lista ) sim) #t]
- [(equal? (first(rest lista)) sim) #t]
- [(equal? (first(rest (rest lista )))sim ) #t]
- [(equal? (first (rest (rest (rest lista)))) sim) #t]
- [(equal? (first (rest (rest (rest (rest lista))))) sim) #t]
- [else #f ]))
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