If \( a_{1}, a_{2}, a_{3}, 5,4, a_{6}, a_{7}, a_{8}, a_{9} \) are in H.P. and \( \Delta=\left|\b...
If \( a_{1}, a_{2}, a_{3}, 5,4, a_{6}, a_{7}, a_{8}, a_{9} \) are in H.P. and \( \Delta=\left|\begin{array}{ccc}a_{1} & a_{2} & a_{3} \\ 5 & 4 & a_{6} \\ a_{7} & a_{8} & a_{9}\end{array}\right| \) then find the value of \( [\Delta] \) is, where [.] denotes G.I.F.
(a) 1
(b) 2
(c) 3
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