An activation function is defined by the formula: f(x) = GELU(xW₁ + b₁) ⊙ (xW₂ + b₂), where x is the input, W and b are learnable parameters, GELU is an activation function, and ⊙ denotes an element-wise product. Based on this structure, what is the primary purpose of the (xW₂ + b₂) component?

GeGLU Activation Calculation

In the GeGLU activation function, defined as σ_geglu(h) = σ_gelu(hW₁ + b₁) ⊙ (hW₂ + b₂), both of the linear transformations (hW₁ + b₁) and (hW₂ + b₂) are passed through the GELU activation function before the element-wise product is computed.