This slide shows the formula for forward propagation in a neural network in an easy-to-understand diagram.
This slide will help you understand how the values of the formula are used in the network.
2,1 (1) 𝑤 3,1 (1) 𝑤 1,2 (1) 𝑤 2,2 (1) 𝑤 3,2 (1) 𝑤2,1 1 𝑤3,1 1 𝑤1,2 1 𝑤2,2 1 𝑤3,2 1 The weights from a 2-node layer to 3-node layer can be expressed as a (2×3) matrix.