Q13: Let z = 3 + e<sup>5xy</sup> .
Q14: Compute the total differential of the function
Q15: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Let ;
Q16: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Let .
Q17: Use implicit differentiation to evaluate <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg"
Q19: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Let .
Q20: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Let .
Q21: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Let .
Q22: Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Let .
Q23: Sketch the graph of <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6988/.jpg" alt="Sketch