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$Number of integers satisfying (x^{2} - 4) \sqrt{x^{2} - 1} < 0 is$

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Correct option is B

x2−4x2−1<0 We must have x2−1≥0 or (x−1)(x+1)≥0 or x≤−1 or x≥1-----(1) Also x2−4x2−1<0⇒ x2−4<0⇒ −2

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Number of integers satisfying x2−4x2−1<0 is

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$Number of integers satisfying (x^{2} - 4) \sqrt{x^{2} - 1} < 0 is$