What is Deep learning? Deep learning is a subset of machine learning. It use cascade of many hidden layer of non-linear processing unit for feature extraction and Transformation. Deep learning works on the basis of ANN(Artificial Neural Network), Where ANN is inspired or Bio-mimics of Human brain. Each successive layer uses the output of its previous layer. Where to use DL: 1.Financial Domani 2.Health care 3. Social medial 4.Access the Domain Few Application: Recommendation,Prediction,Anomaly detection,Drug Detection, Automatic car. Gradient Descent Python code: import numpy as np def gradient_descent(x,y): m=b=0 iterations =10 n=len(x) learning_rate = 0.001 for i in range(iterations): y_predicted = m * x + b cost=1/n * sum([val**2 for val in (y-y_predicted)]) md = -2/n * sum(x*(y-y_predicted)) bd = -2/n...