Contact us
Choose a category below so we can get back to you as quickly as possible.
答案是1/6.x取1/4時cosπx等於1/2,x取6/1時cosπx等於√2/2.同理,負數那邊也可以取得相應值.囙此概率為1/4减去1/6再乘以2.(然後除以1/2-(-1/2)=1,相當於沒除)
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.