4 years ago

Which option do I choose?

Mathematics

1 answer:

garik1379 [7]4 years ago

5 0

Answer:

Does exist -- It only exists when the determinant does not equal zero.

Step-by-step explanation:

The inverse of a matrix is the transpose of the cofactor matrix, divided by the determinant. If the determinant is zero, the result of the division is undefined and the inverse does not exist.

For this matrix, the determinant is (-2)(18) -(9)(4) = -72. The inverse exists.

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