If the 3 a -1 2b0 125 is 10, then what is the determinant of its inverse? determinant of the 3x3 matrix

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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QUESTION 7
If the determinant of the 3x3 matrix
3 a -1
2
b 0
1 2 5
is 10, then what is the determinant of its inverse?
Transcribed Image Text:QUESTION 7 If the determinant of the 3x3 matrix 3 a -1 2 b 0 1 2 5 is 10, then what is the determinant of its inverse?
Expert Solution
Step 1

Given:

Let Matrix A=3a-12b0125

and 

    detA=10

        3a-12b0125=10

      

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