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समीकरण cos^(-1)(cos((2x^(2) + 10|x| +4)/...

समीकरण `cos^(-1)(cos((2x^(2) + 10|x| +4)/(x^(2) + 5|x|+3))) + cot(cot^(-1)(2/(9|x|)-2))=0` को संतुष्ट करने वाले X के सभी वास्तविक मानों का गुणनफल है

A

9

B

`-9`

C

`-3`

D

`-1`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A
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