Find Three Positive Numbers Whose Sum Is and Whose

Q53: Use polar coordinates to find the limit.

Q54: How many nth-order partial derivatives does a

Q55: If <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg" alt="If and

Q56: Find the first partial derivatives of the

Q57: Find equations for the tangent plane and

Q59: Use implicit differentiation to find <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg"

Q60: Determine the largest set on which the

Q61: Which of the given points are the

Q62: Find the directional derivative of <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg"

Q63: Sketch the level curves <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg" alt="Sketch