Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation - Backpropagation -Propagation - Backpropagation - Backpropagation -Propagation - Backpropagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation -Propagation
बताएं कि बैक प्रोपागेशन क्या है और यह कैसे काम करता है।