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Q.

Number of integral values of x satisfying the inequation  xx+21|x| is 

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a

2

b

8

c

4

d

3

answer is C.

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Detailed Solution

x|x|x+21

x|x|x2x+20

 Case I: x[0,) x2x2x+20 (x2)(x+1)x+20  0x2         x[0,)

i.e., integral values of x are 0, 1 , 2.

 Case II: x(,0) x2x2x+20

 2<x<0 x=1 (x(,0))

 

 

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