
অঙ্ক শেখো বাংলায়
\(\overline \alpha = \lambda \hat i + \hat j + 3 \hat k. \overline \beta = - \hat i + 2\hat j + \hat k. \overline \gamma = 3\hat i + \hat j + 2 \hat k\) এবং \(\Big[\overline \alpha\ \overline \beta\ \overline \gamma \Big] = -10\) হলে -র মান নির্ণয় কর ।
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