Find the domain of the following y = ...

Find the domain of the following
` y = sec^(-1) ( x^(2) + 3x + 1) `

A

`( - infty , -3] cup[-2, -1] cup[0,infty)`

B

`( - infty , -3] cup[-2, -1]`

C

`( - infty , -3] cup[0,infty)`

D

None of these

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The correct Answer is:

A

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