a. Show that for a = c 1 3 2 2 d b = c 12 34 12 14 d a # b = b # a = i, sob = a1 . b. Show that a = c 1 2 2 4 d is not invertible. c. Show that a = c a11 a12 a21 a22 d is invertible with inverse b = 1 a11a22 a12a21 c a22 a12 a21 a11 d if and only if a11a22 a12a21 0

Unknowns Add To Take From Put Compare Together/ Take Apart Addend Bigger Both Addends Change Difference Result Smaller Start Total CCSS Problem Types Add To: Addition set-up; action involved Take From: Subtraction set-up; action involved Put Together/Take...