Exercício sobre matriz quadrada

O conjunto solução de $\phantom{X}\dfrac{\begin{vmatrix} 1 & x\; \\ 1 & 1 \end{vmatrix}}{\begin{vmatrix} 1 & 1\; \\ x & 1 \end{vmatrix}}\;=\;\begin{vmatrix} 1 & 1\; \\ x & 1 \end{vmatrix}\phantom{X}$ é:

$\,\lbrace\,x\,\in \,\mathbb{R}\,\vert\,x\,\neq\,1\,\rbrace\,$

$\,\lbrace\,0,\;1\,\rbrace\,$

$\,\lbrace\,1\,\rbrace\,$

$\,\lbrace\,-1\,\rbrace\,$

$\,\lbrace\,0\,\rbrace\,$

resposta: Alternativa E
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