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Mathematics: Functions
Definition A function is a relation between two sets of data where each input has 1 or less potential outputs Horizontal Lines, Parabolas, Linear Equations, Hyperbolas, Exponentials, Polynomials and Cubic Graphs are all examples of functions Circles and Vertical Lines are NOT functions In other words, functions can be one-to-one or many-to-one relationships, but not one-to-many relationships (In reference to input and output values) Notation There are 3 methods of expressing functions: \(y=123\) \(f(x)=123\) \(f:x→123\) All of the above methods say the same thing: When \(x\) is the input, \(123\) is the output For example: \(y=2x\) \(f(x)=2x\) \(f:x→2x\) All state that when \(x\) is the input, \(2x\) is the output Vertical Line Test The vertical line test is a quick way to test if a graph is a function If a vertical line can cut the function TWICE OR MORE, the graph is not a function In the graph below, the red graph is a function, but the blue line is not, because the green vertical line cuts the blue line at 2 points Set Notation In set notation, different types of brackets have different meanings: “(” and “)” are used to write a set where the boundaries are EXCLUDED “[” and “]” are used to write a set where the boundaries are INCLUDED \(\infty\) means Infinity while \(- \infty\) means Negative Infinity \(x\in[1,\infty)\) means that “\(x\) is in the set of all numbers between 1 and infinity” Domain And Range All functions have a Domain and Range The domain of a function is all the valid input values The range of a function is all the valid output values Some input values are INVALID and therefore not part of the Domain For Example: In \(g(x)=\sqrt{x}\), only positive values of \(x\) are possible (because negative numbers have no graphable roots) Therefore, \(x\) must be greater than or equal to zero (0) This can be expressed as \(x \geq 0\) OR \(x\in(0,\infty)\) Some output values are INVALID and therefore not part of the Range y-asymptotes are not part of the range All y values above/below the minimum/maximum y of a graph are not part of the range Transformations of a Function (from \(f(x)\)) Vertical Translation Up \(c\) units: \(f(x)+c\) Vertical Translation Down \(c\) units: \(f(x)-c\) Horizontal Translation Left \(c\) units: \(f(x+c)\) Horizontal Translation Right \(c\) units: \(f(x-c)\) Odd and Even functions Even Functions: Symmetrical about the y-axis Rules: \(f(-x)=f(x)\) If \((x,y)\) is a valid solution to \(f(x)\), \((x,-y)\) is in the same function Odd Functions: Symmetrical about the origin \((0,0)\) Rules: \(f(-x)=-f(x)\) If \((x,y)\) is a valid solution to \(f(x)\), then \((-x,-y)\) is also a valid solution Proving/Solving Odd and Even Functions: Find \(f(-x)\) Simplify \(f(-x)\) If \(f(-x) = -f(x)\), the function is ODD If \(f(-x) = f(x)\), the function is EVEN If \(f(-x) \neq f(x)\) AND \(f(-x) \neq -f(x)\), the function is NEITHER ODD NOR EVEN
SOR1 - The Development of Early Christian Communities
Pentecost Fifty days after the resurrection of Christ Descent of the Holy Spirit Symbolised the Birth of the Church The Jesus Movement 30-60 AD Period immediately after the death of Jesus Early Christians saw themselves as a sect of Judaism, not an independent religion believed that they were living in the last days before the Parousia (second coming of Christ) No proper governing body to determine which Jewish practices should be adhered to Persecuted by both Jews and Romans, who saw them as heretics The titles given by Christians to Jesus (such as Lord) were reserved for Caesarea (Emperors’ family, rulers) The Leaders Small groups of Palestinian Jews followed disciples such as Peter in and around Palestine Larger groups of Diaspora Jews (Jews that were not in Israel/Palestine) and Gentiles (Non-Jews) responded to the teachings of Paul Peter was the first Pope Paul created the structure of the Christian Church The Council Of Jerusalem - 50 AD Purpose was to remove the differences within the early Church Removed the requirement for circumcision, amongst other changes New Testament Period - 45-100 AD Gradual formation and centralization of Christian Churches Establishing independence from Judaism Caused by the delay of the Parousia and the deaths of the Apostles Emperor NERO and the Great Fire - 64 AD Christians were blamed for a fire that burned down a large portion of Rome Triggered a mass persecution of Christians, who were already hated for their non-conformity and intolerance of other religions Resulted in the deaths of Paul and Peter Emperor DIOCLETIAN Augustus and the Last Persecution - 303 AD The last of the Ten Persecutions of the Early Church Ended with the reign of Emperor CONSTANTINE, who established Christianity as the religion of the Empire In 302 AD, Roman rulers declared an edict to destroy churches, burn scripture and enslave those who persevered in following Christianity To tear down the churches to the foundations and to destroy the Sacred Scriptures by fire; and commanding also that those who were in honorable stations should be degraded if they persevered in their adherence to Christianity - Followed by 2 more edicts declaring that Christian leaders should be tortured until they gave up their faith ## Emperor CONSTANTINE and the Edict of Milan - 312 AD - Emperor CONSTANTINE declared tolerance for Christianity throughout the Roman Empire - Ordered land from churches to be returned to Christians ## Council of Nicea - 352 AD - Called by Emperor Constantine to restore religious peace - Pope Sylvester and several bishops attended - Purpose was to sort out theological differences between Christian groups, such as the divine status of Christ - Resulted in the creation of the Nicene Creed - Council of Chalcedeon (451 AD) clarified that Jesus was both fully God and fully Man
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