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If |x|≤ -10, ...

Question

If $| x | \leq - 10$ , then which of the following is/are true?

A

None of the above

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B

x \in ϕ

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C

x \in [10, \infty)

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D

x \in (- 10, 10)

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Solution

The correct option is B $x \in ϕ$
Given that $| x | \leq - 10$

Here $- 10 = a < 0$

Using $| x | \leq a; a < 0 \Rightarrow x \in ϕ$ ,
we can say that here $x \in ϕ$

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