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Show that G = {1, -1} is a group under multiplication.

We must prove the four axioms of a group are satisfied (i.e Identity, Associativity, Closure, and Invertibility). Identity: The identity element is an element e in G such that e x = x e = x for all x in G. C...
RT
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Describe the processes that occur during the first division of meiosis.(6 marks)

The first division of meiosis consists of the stages, interphase, prophase, metaphase, anaphase and telophase. During interphase, growth of the cell and more importantly, DNA replication occurs. After DNA re...
OF
Answered by Orla F. • Biology tutor
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What are the different uses of the perfect and imperfect tense?

The perfect tense is used to describe actions that have been completed, or that happened a certain number of times. For example if you want to talk about something that you did at a specific time in the past...
LM
Answered by Lucy M. • French tutor
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How are you meant to talk about context when answering an A-Level literature paper?

Handling contexts surrounding literary texts is a difficult skill, even for university students. The crucial aspect of doing it well is to make sure it remains relevant to the rest of your argument. Consider...
JW
Answered by Joe W. • English tutor
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Find the minimum value of the quadratic 3x^2-8x+1.

This is a question about completing the square. The first step involves taking the factor of 3 our of the expression to reach the correct form for completing the square to reach 3(x^2-(8/3)x)+1. Then, consid...
JM
Answered by Jamie M. • Maths tutor
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