Wie rechnet man hier den Grenzwert?

1 Antwort

(n - √(n² - 5n + 1)) * (n + √(n² - 5n + 1)) / (n + √(n² - 5n + 1)) =

(5n - 1) / (n + √(n² - 5n + 1)) =

n * (5 - (1 / n)) / (n * (1 + √(1 - (5 / n) + (1 / n²))) =

(5 - (1 / n)) / (1 + √(1 - (5 / n) + (1 / n²)))

lim (n→∞) (5 - (1 / n)) / (1 + √(1 - (5 / n) + (1 / n²))) = 5 / 2