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JEE Mains · Maths · STD 12 - 10. vector algebra

मान लीजिए तीन सदिश \(\overrightarrow{\mathrm{a}}, \overrightarrow{\mathrm{b}}, \overrightarrow{\mathrm{c}}\) हैं। मान लीजिए \(|\overrightarrow{\mathrm{a}}|=2,|\overrightarrow{\mathrm{b}}|=3\) और \(\overrightarrow{\mathrm{a}}=\overrightarrow{\mathrm{b}} \times \overrightarrow{\mathrm{c}}\)। यदि \(\alpha \in\left[0, \frac{\pi}{3}\right]\) सदिशों \(\vec{b}\) और \(\vec{c}\) के बीच का कोण है, तो \(27|\overrightarrow{c}-\overrightarrow{a}|^2\) का न्यूनतम मान ........... है।

  1. A \(110\)
  2. B \(105\)
  3. C \(124\)
  4. D \(121\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(124\)

Step-by-step Solution

Detailed explanation

\( |\overrightarrow{\mathrm{c}}-\overrightarrow{\mathrm{a}}|=|\overrightarrow{\mathrm{c}}|^2+|\overrightarrow{\mathrm{a}}|^2-2 \overline{\mathrm{a}} \cdot \overline{\mathrm{c}} \) \( =|\overrightarrow{\mathrm{c}}|^2+4-0 \)…
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