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LINEAR INEQUALITIES — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSLINEAR INEQUALITIES1 Mark
MCQ
If $x>7$ then $-x>-7$ is, ___________?
  • A
    possible
  • ✓
    certainly false
  • C
    certainly true
  • D
    depend on x
✓

Answer

Correct option: B.
certainly false
  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 $(-1) x<(-1)^7 \Rightarrow-x<-7$.

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