if the graph of the cont. function y=f(x...

if the graph of the cont. function `y=f(x)` passes through the point (a, 0) and `f(x)!=0` in the deleted neighbourhood of a then `(lim)_(x->a)("log"{6f^2(x)-3f(x)+1})/(3f(x))=` (A) 2 (B) 1 (C) -1 (D) none of these

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