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Chapter 3 · Neural Networks
Backpropagation — how models learn
Think of a neural network as a chain of small decisions. When the final answer is wrong, backpropagation traces back through that chain — layer by layer — and adjusts each decision so the next answer is a little closer to right. It's the engine behind every modern AI model.
✦ Up next: Flashcard review — 8 cards on gradient descent
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