If the standard reduction potential (\( E^\circ \)) of \( \left( \text{Ni}^{2+}_{\text{(aq)}} \mid \text{Ni}_{\text{(s)}} \right) \) and \( \left( \text{Al}^{3+}_{\text{(aq)}} \mid \text{Al}_{\text{(s)}} \right) \) are \( -0.25 \, \text{V} \) and \( -1.66 \, \text{V} \) respectively, then what is the standard emf of the cell reaction? \[ 2\text{Al}_{\text{(s)}} + 3\text{Ni}^{2+}_{\text{(aq)}} \longrightarrow 2\text{Al}^{3+}_{\text{(aq)}} + 3\text{Ni}_{\text{(s)}} \]
The number of integral values of $p$ for which the vectors $(p + 1)\hat{i} - 3\hat{j} + p\hat{k},\; p\hat{i} + (p + 1)\hat{j} - 3\hat{k}$ and $-3\hat{i} + p\hat{j} + (p + 1)\hat{k}$ are linearly dependent, is ______.
If \( f(x) = \frac{k \sin x + 2 \cos x}{\sin x + \cos x} \) is strictly increasing for all real values of \( x \), then: