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Free Grade 3 Introducing Reverse Differentiation Common Errors Quizzes

Free Grade 3 quizzes for Introducing Reverse Differentiation Common Errors: 12 real questions with a full answer key and worked solutions. Differentiation finds the rate of change (the gradient) of a curve. For axⁿ, the derivative is naxⁿ⁻¹.

Price

Free

Difficulty

Core

Estimated time

35 min

Total marks

24

Learning objectives

Every objective is checkable, and each one maps to an activity and an assessment.

  • RememberIdentify introducing reverse differentiation common errors

    Identify introducing reverse differentiation common errors accurately in a familiar context.

    Assessed by: Exit ticket of four short items

  • UnderstandExplain introducing reverse differentiation common errors

    Explain introducing reverse differentiation common errors accurately in a familiar context.

    Assessed by: Exit ticket of four short items

  • ApplyCalculate introducing reverse differentiation common errors

    Calculate introducing reverse differentiation common errors accurately in a familiar context.

    Assessed by: Exit ticket of four short items

  • AnalyseCompare introducing reverse differentiation common errors

    Compare introducing reverse differentiation common errors accurately in a familiar context.

    Assessed by: Exit ticket of four short items

Prerequisites

Close these gaps first — each has its own free lesson, worksheet and quiz.

How Introducing Reverse Differentiation Common Errors works

Differentiation finds the rate of change (the gradient) of a curve. For axⁿ, the derivative is naxⁿ⁻¹.

Key wordsderivativegradientrate of changedy/dx

12 practice questions

Easy to hard, 24 marks in total. Try them first, then open the answers.

  1. 1.Differentiate y = 2x^4 + 6x.[1]
  2. 2.Differentiate y = 2x^4 + 3x.[1]
  3. 3.Differentiate y = 5x^4 + 3x.[1]
  4. 4.Differentiate y = 3x^3 + 9x.[1]
  5. 5.Differentiate y = 3x^2 + 8x.[2]
  6. 6.Differentiate y = 4x^5 + 7x.[2]
  7. 7.Differentiate y = 1x^4 + 1x.[2]
  8. 8.Differentiate y = 5x^4 + 1x.[2]
  9. 9.Find the gradient of y = 4x^5 + 5x at x = 1.[3]
  10. 10.Find the gradient of y = 4x^4 + 5x at x = 3.[3]
  11. 11.Find the gradient of y = 1x^5 + 2x at x = 2.[3]
  12. 12.Find the gradient of y = 4x^2 + 2x at x = 2.[3]
Show answers and working
  1. 1. dy/dx = 8x^3 + 6

    Multiply by the power, then reduce the power by 1. 2x^4 → 8x^3; 6x → 6.

  2. 2. dy/dx = 8x^3 + 3

    Multiply by the power, then reduce the power by 1. 2x^4 → 8x^3; 3x → 3.

  3. 3. dy/dx = 20x^3 + 3

    Multiply by the power, then reduce the power by 1. 5x^4 → 20x^3; 3x → 3.

  4. 4. dy/dx = 9x^2 + 9

    Multiply by the power, then reduce the power by 1. 3x^3 → 9x^2; 9x → 9.

  5. 5. dy/dx = 6x^1 + 8

    Multiply by the power, then reduce the power by 1. 3x^2 → 6x^1; 8x → 8.

  6. 6. dy/dx = 20x^4 + 7

    Multiply by the power, then reduce the power by 1. 4x^5 → 20x^4; 7x → 7.

  7. 7. dy/dx = 4x^3 + 1

    Multiply by the power, then reduce the power by 1. 1x^4 → 4x^3; 1x → 1.

  8. 8. dy/dx = 20x^3 + 1

    Multiply by the power, then reduce the power by 1. 5x^4 → 20x^3; 1x → 1.

  9. 9. 25

    dy/dx = 20x^4 + 5. At x = 1: 20 × 1 + 5 = 25.

  10. 10. 437

    dy/dx = 16x^3 + 5. At x = 3: 16 × 27 + 5 = 437.

  11. 11. 82

    dy/dx = 5x^4 + 2. At x = 2: 5 × 16 + 2 = 82.

  12. 12. 18

    dy/dx = 8x^1 + 2. At x = 2: 8 × 2 + 2 = 18.

Worked examples

Easy example

Differentiate y = 4x^3 + 5x.

  1. Multiply by the power, then reduce the power by 1.
  2. 4x^3 → 12x^2; 5x → 5.
  3. Answer: dy/dx = 12x^2 + 5
Medium example

Differentiate y = 6x^5 + 4x.

  1. Multiply by the power, then reduce the power by 1.
  2. 6x^5 → 30x^4; 4x → 4.
  3. Answer: dy/dx = 30x^4 + 4
Hard example

Find the gradient of y = 1x^4 + 6x at x = 3.

  1. dy/dx = 4x^3 + 6.
  2. At x = 3: 4 × 27 + 6 = 114.
  3. Answer: 114

Interactive practice

Free, no account required — answer on screen or print it.

Common mistakes

What learners typically get wrong, and how to fix it.

  • Forgets that a constant differentiates to 0.

    Correction: Constants have zero gradient.

  • Reduces the power but forgets to multiply by it.

    Correction: Multiply by the power, then reduce it by 1.

Teacher tips

  • · Link to gradients of straight lines first.

Parent tips

  • · Ask how speed relates to distance over time.

Real-life applications

  • · Speed from distance, maximising profit.

Assessment objectives

How mastery is evidenced, and which standards it maps to.

IB IB-161.1 — Mapped statement covering Introducing Reverse Differentiation Common Errors.EDEXCEL EDE-114.2 — Mapped statement covering Introducing Reverse Differentiation Common Errors.

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Frequently asked

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What should a learner already know before this?
Start with Introducing Reverse Differentiation Word Problems, Introducing Reverse Differentiation Techniques, Differentiation. Each one has its own free lesson, worksheet and quiz.
How is the quiz sequenced?
Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
What comes next after Introducing Reverse Differentiation Common Errors?
Move on to Working with Reverse Differentiation, Reverse Differentiation in Context, which build directly on this idea.

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