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IB Mathematics: Analysis and Approaches (HL)
Functions
IB Functions
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Functions
IB Mathematics: Analysis and Approaches (HL)
Functions
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30 Terms
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Gradient-intercept form
The form of a linear equation written as y=mx+c, where m is the slope and c is the y-intercept.
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Standard Form
The equation of a line written as ax+by=c.
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Point-slope form
An equation of a line expressed as y-y1=m(x-x1), useful for finding the equation based on a slope and a point.
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Parallel lines
Lines that have the same slope and do not intersect.
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Perpendicular lines
Lines that intersect at a 90-degree angle.
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Function
A relation that assigns exactly one output (y) for each input (x).
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Domain
The set of possible input values (x) for a function.
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Range
The set of possible output values (y) produced by a function.
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Inverse function
A function that reverses the effect of the original function, switching x and y.
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Self-inverse function
A function that is its own inverse, such that f(x)=f-1(x).
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Even function
A function that satisfies f(-x)=f(x).
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Odd function
A function that satisfies f(-x)=-f(x).
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Absolute Maximum
The highest point on the graph of a function.
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Absolute Minimum
The lowest point on the graph of a function.
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Relative Maximum
A point on the graph where the value of the function is higher than at nearby points.
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Relative Minimum
A point on the graph where the value of the function is lower than at nearby points.
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Intercepts
Points where the graph crosses the axes; x-intercept where y=0, and y-intercept where x=0.
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Vertical Asymptote
A line that a graph approaches but never touches, occurring where the denominator is zero.
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Horizontal Asymptote
A value that a graph approaches as x tends towards positive or negative infinity.
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Composite Function
A function created by plugging one function into another, denoted as (fg)(x)=f(g(x)).
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Quadratics
Polynomial functions of degree 2, typically in the form ax^2 + bx + c.
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Factorization
The process of breaking down a polynomial into its constituent factors.
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Zero product property
If the product of two expressions equals zero, at least one of the expressions must equal zero.
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Completing the square
A method for converting a quadratic function into vertex form by rearranging and adding terms.
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Discriminant
A value calculated from the coefficients of a polynomial to determine the nature of its roots.
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Rational functions
Functions that are expressed as the ratio of two polynomial functions.
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Reciprocal functions
Functions of the form f(x)=1/x, characterized by having horizontal and vertical asymptotes at x=0 and y=0.
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Exponential function
A function where the variable is in the exponent, typically in the form f(x)=a(b)^x.
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Logarithmic function
The inverse of an exponential function, expressed in the form f(x)=a*log_b(x).
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Transformations
Alterations to the graph of a function, including translations, stretches, and reflections.
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