Question

A =[ 2 1 2 3 2 7 2 1 3 ] and B=[ −1 −1 3 5 2 −8 −1 0 1 ] are two matrices. Find AB and use this result to solve the following simultaneous equations 2 + 3 + 2 = −1, + 2 + = 1, 2 + 7 + 3 = 7.

Answer 1

Answer:

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Step-by-step explanation:

A=⎣⎢⎢⎡111−24−3312⎦⎥⎥⎤  and   B=⎣⎢⎢⎡11−1−7−5−11−1426⎦⎥⎥⎤

AB=⎣⎢⎢⎡111−24−3312⎦⎥⎥⎤⎣⎢⎢⎡11−1−7−5−11−1426⎦⎥⎥⎤

=⎣⎢⎢⎡11+2−2111−4−711+3−14−5