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Suppose a1, a, are real numbers, with a...

Suppose `a_1, a_, ` are real numbers, with `a_1!=0.` If `a_1, a_2,a_3, ` are in A.P., then `A=[a_1a_2a_3a_4a_5a_6a_5a_6a_7]` is singular `(w h e r ei=sqrt(-1))` The system of equations `a_1x+a_2y+a_3z=0,a_4x+a_5y+a_6z=0,a_7x+a_8y+a_9=0` has infinite number of solutions. `B=[a_1i a_2i a_2a_1]` is non-singular none of these

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