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If the normal of y=f(x) at (0,0) is give...

If the normal of `y=f(x)` at (0,0) is given by `y-x=0`, then `lim_(x->0)(x^2)/( f(x^2)-20 f(9x^2) +2f(99x^2))` is equal to

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If the normal of y=f(x) at (0,0) is given by y-x=0, then lim_(x rarr0)(x^(2))/(f(x^(2))-20f(9x^(2))+2f(99x^(2))) is equal

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If the normal to differentiable curve y=f(x) at x=0 be given by the equation 3x-y+3=0, then the value of lim_(x rarr0)(x^(2))/(f(x^(2))-5f(4x^(2))+4f(7x^(2))) is

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