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- (define (suma lista) (+ (first lista) (first (rest lista)) (first (rest (rest lista))) (first (rest (rest (rest lista))))))
- (define lista (cons 1 (cons 2 (cons 3 (cons 4 empty)))))
- (define (primer-par lista) (
- cond
- [(= (modulo (first lista) 2) 0) (first lista) ]
- [(= (modulo (first (rest lista) ) 2) 0) (first (rest lista))]
- [(= (modulo (first (rest (rest lista))) 2) 0) (first (rest (rest lista)))]
- [(= (modulo (first (rest (rest (rest lista)))) 2) 0) (first (rest (rest (rest lista))))]
- [else "no hay ninguno par"]
- ))
- (define (multiplo-siete lista) (
- cond
- [(= (modulo (first lista) 7) 0) (first lista) ]
- [(= (modulo (first (rest lista) ) 7) 0) (first (rest lista))]
- [(= (modulo (first (rest (rest lista))) 7) 0) (first (rest (rest lista)))]
- [(= (modulo (first (rest (rest (rest lista)))) 7) 0) (first (rest (rest (rest lista))))]
- [else "no hay ninguno multiplo de siete"]
- ))
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