If f: RvecR be a differen tiable functio...

If `f: RvecR` be a differen tiable function atg `x=0` satisfying `f(0)=0a n df^(prime)(0)=1` , then the value of `(lim)_(xvec0)1/xsum_(n=1)^oo(-1)^nf(x/n)=` `e` b. `-log2` c. `0` d.`1`

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