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If (sqrt2 cos x + sqrt2 sin x + sqrt7) m...

If `(sqrt2 cos x + sqrt2 sin x + sqrt7) m =1` holds then

A

greatest negative integral value of m is `-1`

B

least positive integral vlaue of m is 5

C

no such m exists

D

`m in [-7,-1) uu (1, oo)`

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