Q.

The greatest negative integer satisfying  x24x77<0 and x2>4 is

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a

-6

b

None of these

c

-4

d

-7

answer is C.

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Detailed Solution

We have  x24x77<0 and x2>4

(x+7)(x11)<0 and (x2)(x+2)>0

7<x<11 and x<-2  or  x>2

7<x<2

The greatest negative integer is -6.

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