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Question: Answered & Verified by Expert
The set of all solutions of the inequation $x^2-2 x+5 \leq 0$ in $R$ is
MathematicsFunctionsAP EAMCETAP EAMCET 2004
Options:
  • A $R-(-\infty,-5)$
  • B $R-(5,\infty)$
  • C $\phi$
  • D $R-(-\infty,-4)$
Solution:
1226 Upvotes Verified Answer
The correct answer is: $\phi$
Given inequation is $x^2-2 x+5 \leq 0$.
$\therefore$ Roots are
$$
x=\frac{+2 \pm \sqrt{4-20}}{2}=\frac{2 \pm 4 i}{2}
$$
$\therefore$ Roots are imaginary, therefore no real solutions exist.

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