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Messages - caowenqi

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Chapter 1 / why complex plane closed
« on: October 01, 2020, 05:26:28 PM »
why the complex plane is both open and closed? why did it close? Because by definition, a set is called closed if it contains its boundary. And I don't see the complex plane contains its boundary.

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Chapter 1 / how to solve question 33 in textbook section 12
« on: September 23, 2020, 08:04:40 PM »
how to solve question 33 in textbook section 12? I don't understand this problem.

3
Chapter 1 / how to solve the problem in textbook page 16
« on: September 23, 2020, 07:09:13 PM »
why this problem didn't talk about the cake when k = 1, and theta equals 7/8 pai?

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Chapter 1 / how to solve question 19 in section 1.2 in the textbook
« on: September 23, 2020, 04:43:35 PM »
how to solve question 19 in section 1.2 in the textbook
I didn't understand the solution for 19(a) and (c). Thanks a lot!

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