Hoang Giang Share
Janusz
办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
Veinas bọt EPE máy móc
Wendy Ye
A. Blackboard List | Codeforces Round 877 (Div. 2) | Solution Code In Comment.
3 views
3 weeks ago
A. Blackboard List | Codeforces Round 877 (Div. 2) | Solution Code In Comment.
3 views
3 weeks ago
A. Blackboard List | Codeforces Round 877 (Div. 2) | Solution Code In Comment.
![Prove that |[1 +a^2 -b^2, 2ab, -2b],[2ab, 1-a^2 +b^2, 2a],[2b, -2a, 1-a^2 -b^2]| = (1 + a^2 + b^2)^3](http://i.ytimg.com/vi/B7UwIYXEcX8/mqdefault.jpg "Prove that |[1 +a^2 -b^2, 2ab, -2b],[2ab, 1-a^2 +b^2, 2a],[2b, -2a, 1-a^2 -b^2]| = (1 + a^2 + b^2)^3")
![Prove that |[b^2 + c^2, a^2, a^2],[b^2, c^2 + a^2, b^2],[c^2, c^2, a^2 + b^2]| = 4a^2 b^2 c^2](http://i.ytimg.com/vi/IG15iLK0PtI/mqdefault.jpg "Prove that |[b^2 + c^2, a^2, a^2],[b^2, c^2 + a^2, b^2],[c^2, c^2, a^2 + b^2]| = 4a^2 b^2 c^2")
![|[ 1 1 1; a^2 b^2 c^2; b^2+c^2 c^2+a^2 a^2+b^2 ]…](http://i.ytimg.com/vi/88uQOvFXiVs/mqdefault.jpg "|[ 1 1 1; a^2 b^2 c^2; b^2+c^2 c^2+a^2 a^2+b^2 ]…")