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Physics 17 Online
OpenStudy (anonymous):

the number of matrices A such that A is invertible are (a) 20 (b) 18 (c)15 (d)12

OpenStudy (anonymous):

What is A?

OpenStudy (anonymous):

a matrix

OpenStudy (anonymous):

Unfortunately, without given anything further, there are an infinite number of invertible matrices because the matrix size could range from 1x1 to an infinitely large n x n matrix.

OpenStudy (mos1635):

A=? that mast be refering to prexius question......

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