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Jun 21st, 2018
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  1. ;sum-iterative: N x N -> R
  2. ; Berechnet die Summe von i = m bis n von (i + m)/(i + 1)² iterativ
  3. (define (sum-iterative m n)
  4. (define (hilfe m n i e)
  5. (cond
  6. ((= i n) (+ e (/ (+ i m) (* (+ i 1) (+ i 1)))))
  7. ((< i n) (hilfe m n (+ i 1) (+ e (/ (+ i m) (* (+ i 1) (+ i 1))))))))
  8. (cond
  9. ((NOT (AND (integer? m) (integer? n) (> m 0) (> n 0)))
  10. "Fehler: Nur natürliche Zahlen")
  11. ((< n m) 0)
  12. (else (hilfe m n m 0))))
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