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# 9 Neural Networks：Learning

## 9.1 Cost Function

## 9.2 Backpropagation Algorithm

## 9.3 Backpropagation Intuition

## 9.4 Implementation Note_ Unrolling Parameters

## 9.5 Gradient Checking

## 9.6 Random Initialization

## 9.7 Putting It Together

## 9.8 Autonomous Driving