Contact us
Choose a category below so we can get back to you as quickly as possible.
A*B的元素有 1*0=0 1*2=2 2*0=0 2*2=4 即有3個元素:0,2,4 則所有元素之和為6
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.