\[\left| \,\begin{matrix} a+b & a+2b & a+3b \\ a+2b & a+3b & a+4b \\ a+4b & a+5b & a+6b \\ \end{matrix}\, \right|=\] [IIT 1986; MNR 1985; MP PET 1998; Pb. CET 2003]

\[{{a}^{2}}+{{b}^{2}}+{{c}^{2}}-3abc\]

\[\left| \,\begin{matrix} a+b & a+2b & a+3b \\ a+2b & a+3b

1.	\[\left\| \,\begin{matrix} a+b & a+2b & a+3b \\ a+2b & a+3b & a+4b \\ a+4b & a+5b & a+6b \\ \end{matrix}\, \right\|=\] [IIT 1986; MNR 1985; MP PET 1998; Pb. CET 2003]
A.	\[{{a}^{2}}+{{b}^{2}}+{{c}^{2}}-3abc\]
B.	\[3ab\]
C.	\[3a+5b\]
D.	0
Answer» E.

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\[\left| \,\begin{matrix} a+b & a+2b & a+3b \\ a+2b & a+3b & a+4b \\ a+4b & a+5b & a+6b \\ \end{matrix}\, \right|=\] [IIT 1986; MNR 1985; MP PET 1998; Pb. CET 2003]

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