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JEE Mains · Maths · STD 12 - 3 and 4 . metrices and determinant

यदि \(\Delta=\left|\begin{array}{ccc}x-2 & 2 x-3 & 3 x-4 \\ 2 x-3 & 3 x-4 & 4 x-5 \\ 3 x-5 & 5 x-8 & 10 x-17\end{array}\right|=A x^{3}+B x^{2}\) \(+ Cx + D\) है, तो \(B + C\) बराबर है

  1. A \(-1\)
  2. B \(1\)
  3. C \(-3\)
  4. D \(9\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(-3\)

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Detailed explanation

\(\Delta= \left|\begin{array}{ccc}x-2 & 2 x-3 & 3 x-4 \\ 2 x-3 & 3 x-4 & 4 x-5 \\ 3 x-5 & 5 x-8 & 10 x-17\end{array}\right|\) \(=A x^{3}+B x^{2}+C x+D\) \(R_{2} \rightarrow R_{2}-R_{1}\) \(R_{3} \rightarrow R_{3}-R_{2}\)…
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