Differentiation

New Topic: Differentiation, MiA Higher Ch3

By the end of this topic you will:
• be familiar with the terminology associated with differentiation
• understand the principles of differentiation
• be able to derive the gradient formula of a given function
• be able to calculate the gradient of a tangent to a curve
• be able to use differentiation to solve optimisation problems

23 Responses

1. Thursday 11 September, Periods 2 & 3

Introduction to Differentiation
Motion Graphs PPT & WS, calculate gradient of tangents using the normal.
Derive differentaition from first principles if time.

2. Completed powerpoint and activities, finished quicker than expected due to careers talk for half of 2nd period.

Did not look at first principles.

3. Friday 12 September, Period 2

Recap previous lesson. Complete some examples of finding gradient function.

First principles.

4. Most of class managed to follow proof of differentiation from first principles. Also looked briefly at gradient function of another graph and showed link between powers.

5. Monday 15 September, Period 6

Functions starter. Recap work covered.

Basic differentiation, Ex2.

“Multiply by the power, subtract one from the power”
Practice using Show-Me boards before starting Ex2.

6. MA late to class due to meeting.
Class worked on starter.

Very quick recap then began Ex2.
Up to Q7 completed.

7. Tuesday 16 September, Period 1

Differentiation questions on ‘Show-Me’ boards to start then complete Ex2.

See some pupils regarding Algebraic Functions HW while class working if possible.

Homework: Composite & Inverse Functions

Due: Thursday 25 September

8. Discussed issues from Algebraic Functions HW.

Quickfire practice differentiating on show-me boards.

Most close to completing Ex2, remainder to be done at home for next lesson.

9. Wednesday 17 September, Period 6

Indices revision, select examples from Ex3. Continue as class task if weak or set for homework depending on performance.

Move onto differentiating negative/fractional powers, Ex4A.

10. Straight Line starter ‘test’ revising weaker topics from the HW exercise. Poor perfoemance with m = tanx question. Most pupils admitted to not going over homework after returned. Alternative strategy needed.

Spent remainder of lesson recapping indices.

11. Thursday 18 September, Periods 2 & 3

Finsih Indices revision then onto Ex4A and hopefully 4B during 2nd period.

12. After a starter and fairly thorough revision of indices only completed Ex4A up to Q10 by all, some further.

13. Friday 19 September, Period 2

Go over some examples from end of Ex4A then onto Ex4B.

14. Most of Ex4B covered.

15. Monday 22 Spetember, Period 6

Algebraic Functions revision questions to start.
Look at harder examples from Ex4B.

Main lesson – Tangents to curves Ex5A.

16. Response to revision questions still not good enough. Not enough pupils going over their homework and solutions and addressing issues.
Not sure what to try next to encourage greater responsibilty.

All tasks completed and Ex5A started (long ‘lecture’ regarding homework used up time)

17. Tuesday 23 September, Period 1

Complete Tangents Ex5A and begin Ex5B.

18. Done

19. Thursday 25 September, Periods 2 & 3

[School closed to pupils on Wednesday due to Unison industrial action]

Review topic to date and look ahead and elements still to cover.

Starter problems on quadratics, will need to be able to obtain function for quadratic from coordinates for Monday’s lesson.

Complete Ex5B and Sketching Derived Functions if time.

Homework due today.

20. Spent some time on quadratics and discussing topic to date and to come.

Completed Ex5B. Will leave derived functions until later.

21. Friday 26 September, Period 2

Displacement, Velocity & Acceleration

Practical exercise based on walking, obtain motion graph then determine velocity and acceleration.

Complete examples from Ex7.

Stop early to record videos of softball pitched across projector screen for Mondays lesson.

22. We need help…
We are really confused with the homework
Differention 2 is the worst and the gradient of the tangent

23. It is a tough one but you can do it!

Here are some hints for each question that might help.
You need to reply with any specific bits if needed though.

Q1 (a)
Stationary points are points where the gradient is zero. So you need to differentiate the function to obtain the derivative (formula for gradient at any point, x, on the function). and find when it equals zero.

Q1 (b)
Decreasing = down = negative gradient
(Increasing = up = positive gradient)
In your working for part (a) you should have a nature table for your stationary points. Look at it to see where the gradient is negative and write down when it is.

Q2
Differentiate and find value of h'(t) when t = 3.

Q3
Look at the curve sketching examples in your jotter and the help sheet you had on the day I was away. (let me know if you don’t have it)
This question breaks down the curve sketching sum into three parts.

Q4
Firstly don’t be put off by the ‘v’ and ‘u’, they are just the same as using ‘y’ and ‘x’.
You must get the function ready to differentiate, i.e. rearrange the second fraction. (use indices and look at early Ex’s in class jotter)

Q5
This is an optimisation question. You have a couple of examples very similar in your class jotter.
This question is always in two stages, prove the formula (given) then differentiate the formula and find a maximum or minimum.
Check your jotter and see if you can follow an example with the equivalent to part (a).
Even if you can’t manage (a) you can still do (b) by differentiating the answer (given) and using stat-pts and a nature table to find the maximum.

Have another shot and use your class jotter. Every question has very, very similar copies in your jotter!

Get back to me to let me know how you got on and for more help [if needed 😉 ]