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Q.

Number of integral values of x satisfying the inequation  xx+2≤1|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+2≤1x|x|−x−2x+2≤0 Case I: x∈[0,∞) x2−x−2x+2≤0⇒ (x−2)(x+1)x+2≤0 ⇒ 0≤x≤2         ∵x∈[0,∞)i.e., integral values of x are 0, 1 , 2. Case II: x∈(−∞,0) −x2−x−2x+2≤0⇒ −2
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