Contact us
Choose a category below so we can get back to you as quickly as possible.
由定點式設出方程y=a(x+2/3)2+49顯然a小於0因為方程兩根之差等於7那麼方程兩根之差的平方等於49兩根之差的平方可以用兩根之和以及兩根之積來表示由韋達定理可列含有a的方程解得a=-4
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.