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Let f: R->R be such that f(1)=3a n d...

Let `f: R->R` be such that `f(1)=3a n df^(prime)(1)=6.` Then `lim_(x->0)((f(1+x))/(f(1)))^(1//x)=` (a)`1` (b) `e^(1/2)` (c) `e^2` (d) `e^3`

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