If a, b, c are in GP, then what is the value of \[\left| \begin{matrix} a & b & a+b \\ b & c & b+c \\ a+b & b+c & 0 \\ \end{matrix} \right|?\]

If a, b, c are in GP, then what is the value of \[\left| \begin{matrix

1.	If a, b, c are in GP, then what is the value of \[\left\| \begin{matrix} a & b & a+b \\ b & c & b+c \\ a+b & b+c & 0 \\ \end{matrix} \right\|?\]
A.	\[0\]
B.	\[1\]
C.	\[-1\]
D.	None of these
Answer» B. \[1\]

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If a, b, c are in GP, then what is the value of \[\left| \begin{matrix} a & b & a+b \\ b & c & b+c \\ a+b & b+c & 0 \\ \end{matrix} \right|?\]

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