Find the first four terms of the binomial series for the given function. (1 + x/4)^-2 1 - 1/2x + 3/16x^2 - 3/16x^3 1 - 1/2x + 1/4x^2 - 3/32x^3 1 - 1/2x + 3/36x^2 - 1/16x^3 1 - 1/2x + 1/4x^2 - 1/8x^3