Cho ánh xạ tuyến tính f: R³⇒R³ và hai cơ sở của R³ B={b1=(1;3;3),b2=(-3;6;5),b3=(1;2;2 )}
C={c1=(2;0;3),c2=(-5;-1;-5).c3=(1;0 ;1)}
Biết f(b1)=(-5;6;4), f(b2)=(-8;5;2). f(b3)=(=9;-2;-5)
a) tìm ma trận A=[f]E3 từ đó suy ra biểu thức của f(x1;x2;x3)
b tìm ma trận [f]B
c từ [f]B tính ma trận[f]CB

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0

Ataxi company charges $3 for pick-up plus $0.65 for each mile. select the expressions that represent the cost in dollars for a taxi pick-up and m miles. mark all that apply.