1.

If \[{{\Delta }_{1}}=\left| \begin{matrix}    x & b & b  \\    a & x & b  \\    a & a & x  \\ \end{matrix} \right|\] and \[{{\Delta }_{2}}=\left| \begin{matrix}    x & b  \\    a & x  \\ \end{matrix} \right|\]are the given determinants, then

A.  \[{{\Delta }_{1}}=3{{({{\Delta }_{2}})}^{2}}\]
B.  \[\frac{d}{dx}({{\Delta }_{1}})=3({{\Delta }_{2}})\]
C.  \[\frac{d}{dx}({{\Delta }_{1}})=3{{({{\Delta }_{2}})}^{2}}\]
D.  \[{{\Delta }_{1}}=3{{\Delta }_{2}}^{3/2}\]
Answer» C.  \[\frac{d}{dx}({{\Delta }_{1}})=3{{({{\Delta }_{2}})}^{2}}\]


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