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माना f(x)=x^(2)-2x-1AAx inR यदि f:(-oo,a...

माना `f(x)=x^(2)-2x-1AAx inR` यदि `f:(-oo,a]to[b,oo)` जहाँ 'a' बड़ी से बड़ी वास्तविक संख्या है कि f (x) एकैकी आच्छादक है -
`(a+b)` का मान होगा -

A

`-2`

B

`-1`

C

0

D

1

लिखित उत्तर

Verified by Experts

The correct Answer is:
B
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