Mathematics
Mathematics, 20.07.2019 01:20, t0ri21

Matrix question. write the detailed formula and explanation/definition of how you did this, .
a=131 232 b= \bigl(\begin{smallmatrix} 211 \\ 323 \\ 211 \end{smallmatrix}\bigr)
a) what is a+b?
b) what is a x b (a times b) ? what is the multiplication formula for 3*3 matrix? how about the multiplication formula for 2*2 matrix and 4*4 matrix?
c) are a and b invertible? why?

answer
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Matrix question. write the detailed formula and explanation/definition of how you did this, .
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