If \[m\] is a root of the given equation \[(1-ab){{x}^{2}}-\] \[({{a}^ – McqOptions

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1.	If \[m\] is a root of the given equation \[(1-ab){{x}^{2}}-\] \[({{a}^{2}}+{{b}^{2}})x\] - \[(1+ab)=0\] and \[m\] harmonic means are inserted between \[a\] and \[b\], then the difference between the last and the first of the means equals
A.	\[b-a\]
B.	\[ab(b-a)\]
C.	\[a(b-a)\]
D.	\[ab(a-b)\]
Answer» C. \[a(b-a)\]

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