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Q.

The number of integers not satisfying [|x1|]+[|7x|]60 is ( [.]  denotes G.I.F)

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a

7

b

6

c

8

d

2

answer is A.

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Detailed Solution

detailed_solution_thumbnail

 

If x is integer [|x-1|]=|x-1|,[|7-x|]=|7-x|

and for all x1,7

x-1+7-x=6

X=1,2,……..7  satisfy given equation

 

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