Contact us
Choose a category below so we can get back to you as quickly as possible.
答: 因為不含三次項,所以x^3係數為0,xy^2係數為0,即: m-2=0;3n+1=0 解得m=2,n=-1/3 所以2m+3n=2*2-3*1/3=4-1=3 2m+3n=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.