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

यदि समीकरण निकाय \(2 x+3 y-z=5\); \(x+\alpha y+3 z=-4\); \(3 x-y+\beta z=7\) के अनंत हल हैं, तो \(13 \alpha \beta\) = ...........

  1. A \(1110\)
  2. B \(1120\)
  3. C \(1210\)
  4. D \(1220\)
Verified Solution

Answer & Solution

Correct Answer

(B) \(1120\)

Step-by-step Solution

Detailed explanation

Using family of planes \(2 \mathrm{x}+3 \mathrm{y}-\mathrm{z}-5=\mathrm{k}_1(\mathrm{x}+\alpha \mathrm{y}+3 \mathrm{z}+4)+\mathrm{k}_2(3 \mathrm{x}-\mathrm{y}+\beta \mathrm{z}-7)\)…
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