यदि $\vec{a}=\hat{i}+\hat{j}+\hat{k}$,$\vec{b}=-\hat{i}+2\hat{j}-2\hat{k}$ और $\vec{c}=2\hat{i}-\hat{j}+2\hat{k}$ है,तो $(\vec{a}-\vec{b}) \cdot [(\vec{a} \times \vec{b}) \times (\vec{a} \times \vec{c})]$ का मान ज्ञात कीजिए।

  • A
    $-18$
  • B
    $18$
  • C
    $12$
  • D
    $-12$

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यदि $\vec{a}=2 \hat{i}+\hat{j}+2 \hat{k}$ है,तो $|\hat{i} \times(\vec{a} \times \hat{i})|^{2}+|\hat{j} \times(\vec{a} \times \hat{j})|^{2}+|\hat{k} \times(\vec{a} \times \hat{k})|^{2}$ का मान क्या होगा?

माना कि $\vec{a}=2 \hat{i}-\hat{j}+5 \hat{k}$ और $\vec{b}=\alpha \hat{i}+\beta \hat{j}+2 \hat{k}$ है। यदि $((\vec{a} \times \vec{b}) \times \hat{i}) \cdot \hat{k}=\frac{23}{2}$ है,तो $|\vec{b} \times 2 \hat{j}|$ का मान ज्ञात कीजिए।

यदि $\vec{a}, \vec{b},$ और $\vec{c}$ ऐसे सदिश हैं कि $|\vec{b}| = |\vec{c}|$,तो $[(\vec{a} + \vec{b}) \times (\vec{a} \times \vec{c})] \times (\vec{b} \times \vec{c}) \cdot (\vec{b} + \vec{c}) = ...$

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यदि $\vec{a} = \hat{i} + \hat{j} + \hat{k}$,$\vec{b} = \hat{i} + \hat{j}$,$\vec{c} = \hat{i}$ और $(\vec{a} \times \vec{b}) \times \vec{c} = \lambda \vec{a} + \mu \vec{b}$ है,तो $\lambda + \mu$ का मान ज्ञात कीजिए :-

यदि $u = i \times (a \times i) + j \times (a \times j) + k \times (a \times k),$ तो

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