If $a(2+\sqrt{3})=b(2-\sqrt{3})=1,$ then the value of $\frac{1}{a^{2}+1}+\frac{1}{b^{2}+1}$ is

  • A
    $4$
  • B
    $9$
  • C
    $-5$
  • D
    $1$

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Solve the given two equations and select the correct answer from the given options.
$I. 3x^2 - 4x - 32 = 0$
$II. 2y^2 - 17y + 36 = 0$

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The number of values of $k$ for which the equation $x^2 - 3x + k = 0$ has two real and distinct roots lying in the interval $(0, 1)$ is:

If $c > 0$ and the equation $3ax^2 + 4bx + c = 0$ has no real root,then :-

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The value of $k$ for which the equation $2x^2 - kx + x + 8 = 0$ has equal and real roots is:

Solve the given two equations and select the correct answer from the given options.
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$II.$ $y^2 = 169$

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