જો સદિશો $\overrightarrow{p}=(a+1) \hat{i}+a \hat{j}+a \hat{k}$,$\overrightarrow{q}=a \hat{i}+(a+1) \hat{j}+a \hat{k}$,અને $\overrightarrow{r}=a \hat{i}+a \hat{j}+(a+1) \hat{k}$ $(a \in R)$ સમતલીય હોય અને $3(\overrightarrow{p} \cdot \overrightarrow{q})^{2}-\lambda|\overrightarrow{r} \times \overrightarrow{q}|^{2}=0$ હોય,તો $\lambda$ ની કિંમત શોધો:

  • A
    $0.5$
  • B
    $1$
  • C
    $1.5$
  • D
    $2$

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જો $[\bar{a} \bar{b} \bar{c}] \neq 0$ હોય,તો $\frac{[\bar{a}+\bar{b} \quad \bar{b}+\bar{c} \quad \bar{c}+\bar{a}]}{[\bar{b} \bar{c} \bar{a}]}=$

ધારો કે $\vec{a} = \hat{i} - \hat{j}$,$\vec{b} = \hat{j} - \hat{k}$,અને $\vec{c} = \hat{k} - \hat{i}$. જો $\vec{d}$ એકમ સદિશ હોય કે જેથી $\vec{a} \cdot \vec{d} = 0 = [\vec{b} \, \vec{c} \, \vec{d}]$,તો $\vec{d}$ શોધો.

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જો $\vec{a} = \hat{i} + \hat{j} + \hat{k}$,$\vec{b} = \hat{i} - \hat{j} + \hat{k}$,અને $\vec{c} = \hat{i} + 2\hat{j} - \hat{k}$ હોય,તો $\left| \begin{matrix} \vec{a} \cdot \vec{a} & \vec{a} \cdot \vec{b} & \vec{a} \cdot \vec{c} \\ \vec{b} \cdot \vec{a} & \vec{b} \cdot \vec{b} & \vec{b} \cdot \vec{c} \\ \vec{c} \cdot \vec{a} & \vec{c} \cdot \vec{b} & \vec{c} \cdot \vec{c} \end{matrix} \right|$ નું મૂલ્ય શોધો.

$(a+b) \cdot(b+c) \times(a+b+c)$ ની કિંમત શોધો.

જો $\vec{\alpha}$ એક એકમ સદિશ હોય, $\vec{\beta}=\hat{i}+\hat{j}-\hat{k}$, અને $\vec{\gamma}=\hat{i}+\hat{k}$ હોય, તો $[\vec{\alpha} \vec{\beta} \vec{\gamma}]$ નું મહત્તમ મૂલ્ય કેટલું થાય?

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