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Linear Inequalities — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSLinear Inequalities1 Mark
MCQ
If x > 7 then -x > -7 is, ___________?
  • A
    possible
  • B
    certainly false
  • C
    certainly true
  • D
    depend on x
✓

Answer

  1. certainly false

Solution:

If we multiply by negative number on both sides of inequality then,

sign of inequality will change i.e. if x > 7 then (-1) x < (-1)7 ⇒ -x < -7.

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