Question

cho tap hop A=(7,1;-2,(61);0;5,14;4/7;can bac2 cua 1,5; can bac2 cua 81☘

- viet tap hop B gom cac so huu ti thuoc tap hop A

- viet ______C___________vo_______________

 

Answer 1

B={7,1;-2,(61);0;5,14;4/7;\(\sqrt{81}\)}

\(C=\left\{\sqrt{\dfrac{1}{5}}\right\}\)