Question
Asked Nov 21, 2019
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If A, B and X are matrices and AX = B then which of the following statements is correct.

Select one:
a. X= A-1B
b. X = BA
c. X = BA-1
d. A = XB
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Expert Answer

Step 1

Here we put one condition that A is an invertible matrix otherwise all the option is incorrect.

 

Let if A is invertible, the multiply AX = B b...

AX B
Multiply both side by A
|(A A)X A B
(I)X = A*B
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AX B Multiply both side by A |(A A)X A B (I)X = A*B

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Advanced Math