Q1: Find an equation of the tangent line
Q2: The curve with the equation <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6897/.jpg"
Q4: Find the tangent line to the ellipse
Q5: Find dy/dx by implicit differentiation. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6897/.jpg"