Edexcel AS Level Mathematics: Ch 1-3 Practice

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Questions and Answers

When expanding $(2x - 3)^3$ using the binomial theorem, which of the following represents the coefficient of the $x$ term?

  • -108 (correct)
  • -54
  • 54
  • 108

Consider the binomial expansion of $(1 + x)^5$. What is the sum of the coefficients of the first three terms?

  • 10
  • 15
  • 16
  • 11 (correct)

Using the binomial expansion, which of the following is the closest approximation of $(1.1)^3$ to 3 decimal places?

  • 1.330
  • 1.332
  • 1.321
  • 1.331 (correct)

Given $\sin(\theta) = \frac{\sqrt{3}}{2}$ and $0^\circ \leq \theta < 360^\circ$, what are all possible values of $\theta$?

<p>$60^\circ$ and $120^\circ$ (B)</p> Signup and view all the answers

If vectors $\mathbf{a} = 2\hat{i} + 3\hat{j}$ and $\mathbf{b} = \hat{i} - 4\hat{j}$, what is the result of the scalar product $\mathbf{a} \cdot \mathbf{b}$?

<p>-10 (B)</p> Signup and view all the answers

If the expression $4x(2x - 5) + 3(5x^2 - 2x)$ is simplified, what is the coefficient of the $x$ term?

<p>-26 (A)</p> Signup and view all the answers

Which of the following represents the correct factorization of the quadratic expression $x^2 + 7x + 10$?

<p>$(x + 2)(x + 5)$ (D)</p> Signup and view all the answers

After expanding and simplifying $(x - 3)(x + 2)$, what is the constant term?

<p>-6 (D)</p> Signup and view all the answers

For what values of $x$ does the quadratic equation $x^2 - 5x + 6 = 0$ hold true?

<p>x = 2 and x = 3 (B)</p> Signup and view all the answers

Given the roots of a quadratic equation $ax^2 + bx + c = 0$ are $x = 2$ and $x = -3$, and assuming $a = 1$, what is the value of $b$?

<p>1 (D)</p> Signup and view all the answers

What is the solution set for the quadratic inequality $x^2 - 4x - 5 < 0$?

<p>-1 &lt; x &lt; 5 (B)</p> Signup and view all the answers

What value of $x$ satisfies the equation $2x + 3 = 4x - 7$?

<p>x = 5 (D)</p> Signup and view all the answers

Which inequality represents the solution to $3x - 5 \geq 7x + 1$?

<p>$x \leq -\frac{3}{2}$ (C)</p> Signup and view all the answers

Flashcards

Binomial Theorem

A method to expand expressions of the form (a + b)^n.

Binomial Approximation

An approximation using the first few terms of its binomial expansion; accurate when x is small.

Angle (\theta) in Trigonometry

The angle formed by a point on the unit circle, measured counterclockwise from the positive x-axis.

Pythagorean Identity

sin^2((\theta)) + cos^2((\theta)) = 1. It relates sine and cosine of any angle.

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Magnitude of a Vector

The length of a vector.

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What does it mean to ‘simplify’?

Simplifying an expression means to reduce it to its simplest form by combining like terms.

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What is 'factorizing'?

Factorizing is the reverse of expanding; it involves expressing an expression as a product of its factors.

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What is 'expanding'?

Expanding means multiplying out brackets to remove them.

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What are the roots of a quadratic equation?

The solutions to a quadratic equation are also called roots. These are x-values where the equation equals zero.

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What is the 'gradient' of a line?

The gradient (m) represents the steepness and direction of a line. It’s the change in y divided by the change in x.

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What is the y-intercept?

The y-intercept is the point where the line crosses the y-axis (x = 0).

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Circle Equation

The general equation of a circle is (x - a)^2 + (y - b)^2 = r^2, where (a, b) is the center and r is the radius.

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Completing the Square

Completing the square is transforming a quadratic expression into the form a(x + b)^2 + c. This reveals the vertex.

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Study Notes

  • These are practice questions for Edexcel AS Level Mathematics (Pure Year 1).
  • The paper covers topics from Chapters 1-9 and Chapter 11.

Section A: Algebraic Expressions (Chapter 1)

  • Simplify expressions by expanding and combining like terms.
  • Factorize quadratic expressions into the product of two binomials.
  • Expand and simplify the product of two binomials.

Section B: Quadratics (Chapter 2)

  • Solve quadratic equations by factoring, completing the square, or using the quadratic formula.
  • Determine the quadratic equation given its roots.
  • Solve quadratic inequalities by finding critical values and testing intervals.

Section C: Equations and Inequalities (Chapter 3)

  • Solve linear equations by isolating the variable.
  • Solve linear inequalities, remembering to reverse the inequality sign when multiplying or dividing by a negative number.
  • Solve systems of linear equations using substitution or elimination methods.

Section D: Graphs and Transformations (Chapter 4)

  • Sketch quadratic graphs, identifying the vertex, x-intercepts, and y-intercept.
  • Describe transformations of graphs, including translations and reflections.
  • Find the coordinates of the vertex of a quadratic function.

Section E: Straight Line Graphs (Chapter 5)

  • Find the gradient of a line given two points on the line.
  • Determine the y-intercept of a line from its equation.
  • Find the coordinates of the point where a line crosses the x-axis.
  • Find the equation of a line given its gradient and a point on the line.

Section F: Circles (Chapter 6)

  • Determine the center and radius of a circle from its equation in the form (x - a)^2 + (y - b)^2 = r^2.
  • Find the coordinates of the points where a circle intersects the x-axis by setting y = 0 in the circle's equation.
  • Find the equation of a circle given its center and a point on the circle.

Section G: Algebraic Methods (Chapter 7)

  • Solve equations involving fractions.
  • Express a quadratic expression in the completed square form a(x + b)^2 + c.

Section H: Binomial Expansion (Chapter 8)

  • Expand binomial expressions using the binomial theorem.
  • Find specific terms in a binomial expansion.
  • Approximate values using binomial expansion.

Section I: Trigonometric Ratios (Chapter 9)

  • Solve trigonometric equations for angles within a specified range.
  • Prove trigonometric identities.
  • Find the exact values of trigonometric ratios for specific angles.

Section J: Vectors (Chapter 11)

  • Find the magnitude of a vector.
  • Determine the scalar product (dot product) of two vectors.
  • Find the vector between two points given their position vectors.

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