Contact us
Choose a category below so we can get back to you as quickly as possible.
絕對值大於等於0 相加為0則都等於0 所以a-1=0,b+3=0.3c-1=0 a=1,b=-3,c=1/3 所以abc=-1 原式=-1/(-27×1/9)=1/3
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.