COMPLEJIDAD ESTA

   public boolean esta(T dato){

       if(this.esVacio())//2
            return (false);//2
        boolean rta = (this.esta(this.raiz,dato));//O(n)
        return rta;//1
      }

T(n)=2+2+n+1
T(n)=2+2+n+1
T(n)=5+n
O(n)