Sketch the Level Curves of the Function for the Indicated

Q8: Find three positive real numbers whose sum

Q58: Find three positive numbers whose sum is

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"

Q64: Find the points on the surface <img

Q65: Find <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5971/.jpg" alt="Find for

Q67: Find the equation of the normal line

Q68: Find the local maximum, and minimum value