The linear transformations

T_(1)=R^(3)->R^(3)

and

T_(2)=R^(3)->R^(3)

are defined by

T_(1)([[x_(1)],[x_(2)],[x_(3)]])=[[x_(1)],[x_(1)+x_(2)],[x_(1)+x_(2)+x_(3)]]

and \ What is

T_(2)@T_(1)([[-1],[2],[1]])?

\

[[-3],[0],[1]]

\

[[-3],[-1],[3]]

\

[[-3],[-2],[0]]

\ (D)

[[1],[-2],[3]]

The linear transformations T1=R3R3 and T2=R3R3 are defined by T1x1x2x3=x1x1+x2x1+x2+x3 and T2x1x2x3=x1x3x2x3x3x1 What is T2T1121 ? (A) 301 (B) 313 (C) 320 (D) 123