3. Find the slope of the line tangent to the graph y² + x² y = 3x² at the point (2,2) :_________

9.在一個半徑為「的球內,內接一圓柱體,求出此圓柱體之半徑為多少時,其體積為最大值。 (20%)

Part 4: Short essay writing 20% (本大題於答案卷作答)Write an essay of approximately 300 words in English. Give your essay a title, and include the following: a) how the different aspects of your life, e.g. life style, study, interpersonal relationship, etc. have changed because of COVID-19,and b) personal reflection from this experience.The maximum score for your essay is 20%. You receive 10 points for content, and another 10 for form such as vocabulary, grammar, sentence variety, and writing skills.Part 4: Short essay 

1. Let x ＞ 0. =_________

2. =_________

4. Find =_________

5. Find the point on the graph of y = that is nearest the point (1,0):_________

6. Find the interval on which the function f(x) = x3 - 3x2 - 9x + 12 is decreasing:_________

7. =_________

8.=_________

9.=_________