. Trong không gian vector ℝ3 cho hai hệ vector
{ } 1 2 3 ( 2,2,5); (2,1,3); (3,1,3) U u m u u = − = = = , { } 1 2 3 ( ( 1,2,1); ,2,1); ( 1,7,4) V v m v m v = = = − −= .
a. Chứng tỏ U , V là hai cơ sở của ℝ3
.
b. Cho x m = − ( ,2, 3), tìm tọa độ của x theo cơ sở V .
c. Tìm PU V →
và PV U →
.
d. Sử dụng công thức đổi tọa độ, tìm tọa độ của x theo cơ sở U .

Parks is wearing several rubber bracelets one third of the bracelets are tie-dye 1/6 are blue and 1/3 of the remainder are camouflage if parks wears 2 camouflage bracelets how many bracelets does he have on

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

Circle d circumscribes abc and abe. which statements about the triangles are true? statement i: the perpendicular bisectors of abc intersect at the same point as those of abe. statement ii: the distance from c to d is the same as the distance from d to e. statement iii: bisects cde. statement iv: the angle bisectors of abc intersect at the same point as those of abe. a. i only b. i and ii c. ii and iv d. i and iii e. iii and iv