Contact us
Choose a category below so we can get back to you as quickly as possible.
當n=2時,是n的1/2; 當n=3時,是n的2/2倍; 當n=4時,是n的3/2倍; 當n=5時,是n的4/2倍; . 以此類推得出 當n=m時,是n的(m-1)/2; 當n=n時,是n的(n-1)/2. 故由上可得公式為:n(n-1)/2.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.