Grade 12 Maths Paper 1 November 2025 Memo | Question 3 | Quadratic Sequences | Matric Exam (NSC)

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🎓 Mathematics Paper 1 – NSC November 2025 Grade 12 Maths Paper 1 Memo.
📘 QUESTION 3

0:00 The depth of a torpedo below sea level forms a quadratic pattern, where 0 metres is at sea level. A submarine tracked a torpedo in one-second intervals.

The depth (in metres) that the torpedo reached is given in the table below:

Time (seconds) Depth (in metres)
At the end of the first second 36
At the end of the first 2 seconds 71
At the end of the first 3 seconds 104

0:35 3.1 Calculate the depth of the torpedo at the end of the first 5 seconds.
(2 marks)

3:30 3.2 Show that the depth of the torpedo at the end of n seconds was
T_n = -n^2 + 38n - 1
(3 marks)

5:20 3.3 Calculate the maximum depth that the torpedo reached.
(3 marks)

9:44 3.4 After how many seconds was the torpedo at 104 m below sea level for the second time?
(2 marks)

🧠 You’ll Learn:
✅ How to find the quadratic equation from a data pattern
✅ How to calculate maximum or minimum values in motion problems
✅ How to determine when an object reaches a specific height or depth
✅ Step-by-step strategies for interpreting tables and parabolic motion in exams
Perfect for:
📖 Matric students preparing for Maths Paper 1 (Functions & Parabolas)
🧩 NSC | CAPS | DBE learners
📈 Teachers using SmartPrep for revision lessons
🧮 Tags:
Grade 12 Maths Paper 1 November 2025 Memo, Mathematics Paper 1, Matric Maths 2025, Quadratic Functions, Parabolic Motion, Torpedo Question, Depth vs Time, SmartPrep, Revision, Study Guide, NSC, CAPS, DBE
🔥 Hashtags:
#Matric2025 #MathsPaper1 #MatricMaths #SmartPrep #MatricRevision #Grade12Maths #CAPS #NSC #DBE #ExamPrep #StudySmart #Functions #Parabolas