Respuesta :
You can expand this using the binomial theorem
= 1/256 + 4C1 (1/4)^3 y + 4C2 (1/4)^2 y^2 + 4C3 (1/4) y^3 + y^4
= 1/256 + 1/16 y + 3/8 y^2 + y^3 + y^4
= 1/256 + 4C1 (1/4)^3 y + 4C2 (1/4)^2 y^2 + 4C3 (1/4) y^3 + y^4
= 1/256 + 1/16 y + 3/8 y^2 + y^3 + y^4