1.4.6 Matrix Transformations

Condition: Perform operations on matrices: \ (a \ cdot b+3 \ cdot c \ cdot b, \ quad \) where \ (a = \ left (\ begin {array} {ccs} 2 & 1 & -1 \\ 3 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 \ END {Array} \ RIGHT) \), \ (B = \ LEFT (\ Begin {Array} {CC} 1 & 5 \\ 2 & 1 & -1 &1 \ END {Array} \ RIGHT), C = \ Left (\ Begin {Array} {lll} 3 & 4 & 2 & 2 & 1 & 1 \ End {Array} \ Right) \)