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
10 months ago
If C is a smooth curve given by a vector function r(t) , a ⩽t ⩽b , show …
10 months ago
If C is a smooth curve given by a vector function r(t) , a ⩽t ⩽b , show …
![Prove that: 2a²+2b²+2c²-2ab-2bc-2ca = [ (a-b)²+(b-c)²+(c-a)² ]](http://i.ytimg.com/vi/y2RMTtdtf50/mqdefault.jpg "Prove that: 2a²+2b²+2c²-2ab-2bc-2ca = [ (a-b)²+(b-c)²+(c-a)² ]")
![Prove that |[a - b - c, 2a, 2a],[2b, b - c - a, 2b],[2c, 2c, c - a - b]| = (a + b +c)^3](http://i.ytimg.com/vi/F6Kll3fQIB0/mqdefault.jpg "Prove that |[a - b - c, 2a, 2a],[2b, b - c - a, 2b],[2c, 2c, c - a - b]| = (a + b +c)^3")