Cho ánh xạ tuyến tính f : R^3 → R^3 và hai cơ sở của R^3 : B ={b1=(1,3,3),b2=(-7,6,5),b3=(1,2,2) }
C= {c1=(2,-4,3),c2=(-5,-1,-5),c3=(1,0, 1)}

Biết:
f b(1 ) ( -5,6,4) =

f b(2 ) ( -8,5,2) =

f b( 2) ( -9, -2, -5) =

a. Tìm ma trận A=[F]e3'= , từ đó suy ra biểu thức của f(x1,x2,x3)

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.