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2.6 Division of complex numbers

The second of the conjugate–modulus properties enables us to find reciprocals of complex numbers and to divide one complex number by another, as shown in the next example. As for real numbers, we cannot find a reciprocal of zero, nor divide any complex number by zero.

Example 2

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Inuit Throat Singing
In many cultures, song is perhaps one of the most important traditions. What is extraordinary about the Inuit musical tradition is the way they create their songs - with notes originating from their throats. The song isn't interrupted even when a breath has to be taken. The 6 tracks in this album focus on Tanya Tagaq, who describes the amazing art of throat singing and how her heritage and culture, carried in her heart forever, has driven her to continue with this unique tradition. This mater
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Online Safety-Passwords
In this video you will learn about password protection and how hackers use information you enter.  Users are often predictable as to the passwords they choose.  It is easy for hackers to get your password.   Never write down your passwords-memorize it so people can't get it. This will show you how to protect your password.
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Weekly Expression #8: Trocar uma ideia
This week's expression is about having good conversations: Trocar uma ideia. The post Weekly Expression #8: Trocar uma ideia appeared first on Really Learn Portuguese.

Check out our website, reallylearnportuguese.com and find out more how we can help you to improve your Portuguese language skills!

Natural After Shave Moisturizer

Video link (see supported sites below). Please use the original link, not the shortcut, e.g. www.youtube.com/watch?v=abcde

Author(s): AaronPritchard

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Creative Writing
The tracks on this album offer an invaluable insight into a wide range of techniques and practices surrounding Creative Writing. Writers as diverse as Alan Ayckbourn, Ian McMillan and Tanika Gupta talk openly about their approaches and attitudes to all aspects of writing from original concept to final drafts and productions. Writing for stage, print, television and radio is discussed in engaging and articulate detail. This material forms part of The Open University course A363 Advanced creative
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The Progressive Era
Video discusses the Progressive Era in the United States. It was a period of reform which lasted from the1 890s to the 1920s.  The video discusses the presidents during this time period, the muckrakers, political reform, and amendments established.  This is a great video that gives a lot of information. (09:57)
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Google Scholar Can be a Starting Point for Research
A colleague once said that students can't use Google for research, because they don't know how to search properly. She was primarily concerned that inexperienced researchers do not know how to identify legitimate online resources. Google Scholar solves this problem by providing books, articles and even legal documents on virtually any subject. (There is no sound.) (01:53)
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The Economist asks: Should today’s world leaders be hawks or doves?

John Lewis Gaddis, author of “On Grand Strategy”, assesses whether there is order in Mr Trump’s chaos, the balance of global power and whether the age of liberal interventionism is over. Anne McElvoy hosts. Music by Chris Zabriskie “Divider” (CC by 4.0 UK)


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3 A diversity of views

Another vital strategy for survival (or for the justification of survival) is for geography teachers to teach well. Given the wealth and range of lively material available to geography teachers and the richness of life in the real world, it ought to be rare for a geography teacher not to be able to interest or stimulate students in some part of the subject on its own merits

(Walford, 2001, p. 238)

<
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Patient Letters: Ovarian Cancer Survivor has "Amazingly Positive" Experience
This letter was written to UMMC from an ovarian cancer survivor, who is also a faculty member at the University of Maryland School of Nursing. She gives her thanks and appreciation to Dr. Sarah Temkin and her team for the incredible care and warmth they showed her during her fight with cancer. Related Links: Greenebaum Cancer Center http://www.umgcc.org/ Gynecologic Oncology Program http://www.umgcc.org/gyn_program/ovarian.htm Diagnostic and Treatment Services http://www.umgcc.org/gyn_progra
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Learning outcomes

After studying this course, you should be able to:

  • describe the key points of the waterfall model applied to database development

  • appreciate the roles of various development artefacts, such as the data requirements document, conceptual data model and such like used to communicate between activities in the database development life cycle

  • communicate effectively about aspects of the development of databases.


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Sun's Magnetic Reversal
The sun's polarity is getting closer to flipping. The star's northern hemisphere's polarity has already reversed, and the southern hemisphere should follow suit soon, scientists say. Every 11 years or so, the two hemispheres of the sun reverse their polarity, creating a ripple effect that can be felt throughout the far reaches of the solar system. The sun is currently going through one of those flips in its cycle, scientists working at Stanford University's Wilcox Solar Observatory, which has mo
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What Happened to Collaborative Design?
In this paper we present the results of a comprehensive literature survey on the development of collaborative design. We reviewed 324 papers on collaborative design, taken from various sources (conferences, journals, and PhD-theses). We grouped the papers based on common themes, and in that way derived a classification of themes through the last 25 years (1983-2008). Each category is described, its development, and key publications are identified.
Author(s): Achten, Henri; Beetz, Jakob

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1.13 Extract 1 References

Antonovsky, A. (1979) Health, Stress and Coping: New Perspectives on Mental and Physical Well-Being, San Francisco, CA, Jossey-Bass.

Antonovsky, A. (1987) Unraveling the Mystery of Health: How People Manage Stress and Stay Well, San Francisco, CA, Jossey-Bass.

Blaxter, M. (1983) ‘The causes of disease: women talking’, Social Science and Medicine, Vol. 17, No. 2, pp. 59–69.

Bowling, A. (1991) Measuring Health, Buckingham, Open University Pres
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References

Advisory Centre for Education (ACE) (2004) ‘Laws to protect children with SEN “in conflict”’, Bulletin no. 121, October, p. 4.
Armstrong, D. (2003) Experiences of Special Education: re-evaluating policy and practice through life stories, London, RoutledgeFalmer.
Aspis, S. (2004) ‘Why exams and tests do not help disabled and non-disabled children learn in the
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History, Memory, Politics in Democratisation Research: a personal and professional journey [Audio]
Speaker(s): Professor Tomila Lankina | Three decades after the collapse of communism in Europe, a number of post-communist states experienced democratic back-sliding or embraced authoritarianism. In her inaugural lecture, Tomila Lankina discusses how her research into the durability of social structure of pre-communist Russia— elements of which she argues survived the revolutionary experiment to engineer a new society—helps explain democratic resilience and backsliding in Russia and other co
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The Economist asks: How do you win the AI race?

Artificial intelligence is developing fast in China. But is it likely to enable the suppression of freedoms? One of China's most successful investors, Neil Shen, has a short answer to that question. Also, Chinese AI companies now have the potential to overtake their Western rivals -- we explain why. Anne McElvoy hosts with The Economist's AI expert, Tom Standage


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Geography: Climate and Vegetation
This video clip is an introduction to climate and vegetation in world regional geography. IU Southeast Instructor: Clint Franklin (01:01)
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