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If (sqrt2cosx+sqrt2sinx+sqrt7)m=1 holds ...

If `(sqrt2cosx+sqrt2sinx+sqrt7)m=1` holds then

A

greatest-ve integral value of m is(-1)

B

least positive value of m is 5

C

nosuch m exists

D

`m in[-7,-1]cap(1,infty)

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The correct Answer is:
C
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