Quadratic Functions and Reciprocals Quiz

Basic Mathematics and Statistics (BPC2111)

• This course covers basic math and statistics concepts.
• Topics include basic calculations, functions, domain, co-domain, and range.
• Additional topics include quadratic and reciprocal functions, equations, graphs, polynomial functions, division algorithms, zeros of polynomials, and the rational zero theorem.

Functions

• A function maps inputs (x) to outputs (f(x)).
• Input values form the domain, and output values form the range.

Domain, Codomain and Range

• Domain: All possible input values (x) for a function.
• Codomain: The set of all possible output values (y) a function can produce.
• Range: The set of actual output values (y) produced by the function for the given domain.

Question 1

• Let f(x) = 1/(x²-4)
• Maximal domain of f is {x | x < -2 or -2 < x < 2 or x > 2}.
• Range: {y | y ≤-¼ or y > 0}.

Quadratic Equations

• There are three methods for solving a quadratic equation of the form ax² + bx + c = 0:
  • Factorisation.
  • Completing the square.
  • Quadratic formula.

Quadratic Equation: Factorisation Method

• Consider the equation 2x² = 13x − 15.
• Solving using factorisation yields the solutions x = 5 or x = 3/2.

Quadratic Equations: Completing the Square Method

• For instance, solving 3x² - 6x + 2 = 0 using this method leads to x = 1 ± √(1/3)

Quadratic Equations: Quadratic Formula Method

• The quadratic formula, derived by completing the square, is x=(-b ± √(b² - 4ac))/2a.
• Used to find the roots of any quadratic equation.
• Example: Solving 3x² = 4x + 2 using the quadratic formula gives x = (2 ± √(10))/3.

Reciprocal Equation

• A reciprocal function is defined as f(x) = 1/x.
• The reciprocal function for zero is undefined.
• The reciprocal function of a positive or negative number is negative or positive respectively.
• Reciprocals of large numbers get close to zero.

Graph of Reciprocal Function

• The graph of 1/x shows a curve in the first and third quadrants that approaches the axes but never touches them.

Graph of Quadratic Functions

• The graph of y = ax² + bx + c is a parabola.
• If a > 0, the parabola opens upwards, having a minimum.
• If a < 0, the parabola opens downwards, having a maximum.
• Stationary points (min or max) can be found using the squared form (x + p)² + q

Question 2

• For f(x) = 3x² - 4x + 1, the minimum value is -1/3 occurring at x = 2/3.

Question 3

• For f(x) = -3x² + 5x - 2, the maximum value is 1/12 occurring at x = 5/6.

Polynomial Function

• A polynomial is a function consisting of nonnegative integral powers of x, multiplied by real numbers.
• Examples: Constant, Linear, and Quadratic.

Polynomial Functions: Division Algorithm

• If you divide polynomial P(x) by D(x) the result is Q(x) + R(x)/D(x), where R(x) has a lower degree than D(x).

Remainder Theorem

• When a polynomial f(x) is divided by (x - a) , the remainder is f(a).

Polynomial Functions: Factor Theorem

• If f(x) = (x-a) Q(x) + R then if f(a)=0, then (x−a) is a factor of f(x).

Polynomial Functions: Rational Zero Theorem

• If a rational number p/q is a zero then p is a factor of the constant term and q is a factor of the coefficient of the highest power term.

Exercise 1

• This section displays various quadratic equations to solve.

Exercise 2

• This section contains problems on quadratic functions.

Exercise 3

• More problems on quadratic functions.

Exercise 4

• Problems on quadratic equations and finding roots.

Exercise 5

• Problems on finding the lengths of sides of squares.

Exercise 6

• This section contains a collection of problems requiring the computation of quadratic and other equations.

Exercise 7

• This exercise contains problems on finding stationary points of curves using completing the square.

Exercise 8

• These are problems on quadratic functions, with questions on repeated roots and sketches of curves.

Exercise 9

• Quadratic equations and their solutions.

Exercise 10

• Problems on quadratic functions and their properties with sketching graphs

Exercise 11

• Questions to solve using the method of completing the square.

Exercise 12

• Solving quadratic exercises.

Exercise 13

• Problems on derivatives of functions and their nature.

Exercise 14

• Includes solving for different types of quadratic equations.

Exercise 15

• Quadratic equations problems.

Exercise 16

• Quadratic equations questions.

Exercise 17

• Problems on polynomial inequalities.

Exercise 18

• Problem on inequalities involving absolute values.

Exercise 19

• Finding the values of variables in inequalities.

Exercise 20

• Solving inequalities involving polynomial expressions.

Exercise 21

• Solving inequalities.

Exercise 22

• Solving problems involving inequalities.

Exercise 23

• Solving problems involving the points of discontinuity in given functions.

Exercise 24

• Problems involving function continuity.

Exercise 25

• Questions on function continuity.

Exercise 26

• Problems on finding the value of constants.

Exercise 27

• Questions on finding and factoring expressions.

Exercise 28

• Factoring exercises.

Exercise 29

• Factoring polynomials.

Exercise 30

• Factoring polynomials with special conditions.

Exercise 31

• Factorization and equation solving.

Exercise 32

• Solving cubic equations.

Exercise 33

• Factorizing cubic equations.

Exercise 34

• Factorizing cubic equations.

Exercise 35

• Factoring and solving quartic equations.

Exercise 36

• Determining whether a polynomial has a rational zero.

Exercise 37

• Factoring polynomial expressions.

Exercise 38

• Determining coefficients of a polynomial based on constraints.

Exercise 39

• Solving cubic equations.

Exercise 40

• Determining the value of a constant in an equation given a factor.

Exercise 41

• Finding the domain and range of a function.

Exercise 42

• Determining the range and domain of a function.

Exercise 43

• Questions related to curve sketching and asymptotes.

Exercise 44

• Problems related to curve sketching and finding asymptotes.

Exercise 45

• Problems on inequalities.

Exercise 46

• Solving inequalities and related problems.

Exercise 47

• Inequalities involving absolute values.

Limits of Functions

• The limit of a function as x approaches a value 'a' is the value the function approaches as x gets closer and closer to 'a'.

Limits at Infinity

• The limit of a function as x approaches positive or negative infinity is the value the function approaches as x becomes very large or very small.

Infinite Limits

• Infinite limits occur when a function approaches positive or negative infinity as x approaches a value.

One-sided Limits

• One-sided limits are the limits of a function as x approaches a value from either the left or the right.

Continuity of Functions

• A function is continuous at a point if the limit of the function as x approaches that point equals the value of the function at that point.

Question 1 - Limits

• Evaluating a limit involving a square root (at x = 1)

Question 2 - Limits at Infinity

• Finding the limit of a rational function as x approaches infinity.

Question 3 - Points of Discontinuity

• Identifying points where a function is not continuous.

Exercise 1 - Definite Integrals

• Evaluating definite integrals.

Exercise 2 - Definite Integrals

• Determining areas between curves using definite integrals.

Question 3 - Definite Integrals

• Calculating the value of a definite integral given information about related definite integrals.

Area Between Two Curves

• The area between two curves can be determined via definite integration.

Question 1 - Area Between Curves

• Finding the area between a curve and the x-axis within given x-coordinates.

Question 2 - Area Between Curves

• Determining the area between two given curves.

Question 3 - Exponential Growth and Decay

• Given info. on definite integrals, determine another integral value involving the same function

Learning Outcomes

• Real number system, percentage, variation, law of indices, logarithmic law, and progression are in this unit
• Problems are related to evaluating and simplifying different numerical problems
• The unit also covers various exercises involving these topics.

Test your understanding of reciprocal functions and quadratic equations with this quiz. Covering topics like the maximum value of quadratic functions and the significance of the vertex, this quiz will challenge your knowledge and problem-solving skills. Perfect for students studying algebra and functions.