The line y=m x-((a^2-b^2)m)/(sqrt(a^2+b^...

The line `y=m x-((a^2-b^2)m)/(sqrt(a^2+b^2m^2))` is normal to the ellise `(x^2)/(a^2)+(y^2)/(b^2)=1` for all values of `m` belonging to `(0,1)` (b) `(0,oo)` (c) `R` (d) none of these

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