Infinite number of masses each of $1 \mathrm{kg}$, are placed along the $x$-axis at $x=\pm 1 m, \pm 2\mathit{ }m,\pm 4 m, \pm 8 m, \pm 16\mathit{ }m, \dots \dots$ The magnitude of the resultant gravitational potential in terms of gravitational constant $G$ at the origin$\left(x=0\right)$  is