## MEI DIFFERENTIAL EQUATIONS COURSEWORK MARK SCHEME

May 25, 2019

A common error was to omit the minus sign from the first term. In such cases you must ensure that you refer back to the answer of the previous part question even if this is not shown within the image zone. By and large the correct formulae were used and the entire solution was worked in radians, nearly always resulting in full marks. Only a few candidates failed to show sufficient detail of their working to earn the third mark following a fully correct. Comments on Individual Questions: Please contact OCR Copyright should you wish to re-use this document.

This is the completed version and I scored. Who marks the coursework. This is produced for each series of examinations and is freely available to download from our public website www. Many started again to find the sum of the first ten terms, and did so successfully. Views Read Edit View history. In both cases an easy mark was lost. Tasks which allow only superficial or trivial treatment should be avoided.

# A-level Mathematics/MEI/DE – Wikibooks, open books for an open world

Views Read Edit View history. Past Papers Keele Maths. However, Centres which are new to the scheme are strongly recommended to use the tasks published by MEI while they are familiarising themselves with the nature differengial coursework. Tasks which allow only superficial or trivial treatment should be avoided.

Unless otherwise indicated, marks once gained cannot subsequently be lost, eg wrong working following a correct form of answer is ignored. Part v Many candidates wrote sensible responses to differejtial question.

## A-level Mathematics/MEI/DE

A number of candidates obtained negative answers for both a and r, but never suspected anything was amiss. A very few eequations instead of integrating. Please can anyone help, Integration, c3 mei, ocr maths!?!? However, it is not usually sufficient for a candidate just to indicate an intention of using some method or just to quote a formula; the formula or idea must be applied to the specific problem in hand, eg by substituting the relevant quantities into the formula.

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Often this went astray, resulting in a loss of three marks. Retrieved from ” https: Question 13 Part i Wrong working often spoiled courseworrk correct final answer in this question. A small number left the calculator in radian mode and lost the final mark; a very small number tried to use Pythagoras or lost their way after earning the first method mark.

Unless otherwise specified the value of the acceleration due to gravity should be taken to be exactly 9. By mdi large the correct formulae were used and the entire solution was worked in radians, nearly equwtions resulting in full marks. Give your answer correct to 3 decimal places.

Centres are advised that using a graphical calculator to evaluate a definite integral or to solve an equation eg question 10 will earn no credit unless the relevant working is presented. Verify that the stationary point is a maximum. Write down two equations in a and r, where a is the first term and r is the common ratio.

Year Number of years since 5 10 15 20 25 30 35 40 45 50 t Reduction in equatiions since 0.

Mathematics courssework Education and Industry MEI MEI is committed to improving mathematics education and promotes teaching and learning through different strands of activity. This is produced for each series of examinations and is freely available to download from our public website www.

Candidates were expected to comment on the model continuing to predict an ever increasing rate of reduction in the thickness of the ice, in spite of the fact marj at some point all the ice will have melted. Part ii Most recognised the arithmetic progression, but some were uncomfortable with a non-numerical a and made a spurious attempt to find its value.

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On the other hand, when two or more steps are successfully run together by the candidate, the earlier marks are implied and full credit must be given. It is vital that you annotate standardisation scripts fully to show how the marks have been awarded.

## mei ocr maths coursework

Sometimes this is reinforced in the mark scheme by the abbreviation isw. Most plotted the points adequately and drew a single ruled line of best fit clursework the whole range of x-values to earn two marks. If in doubt, contact your Team Leader. Premature approximation followed by over-specification of final answers also cost some candidates easy marks.

Some candidates worked in degrees and then worked with rounded numbers, often following on to over specify their answer and lose the final mark. Correct but unfamiliar or unexpected methods are often signalled by a correct result following an apparently incorrect method. Make sure you know what you have to do before starting your answer.

Correct solutions leading to correct answers are awarded full marks but work must not be judged on the answer alone, and answers that are given in the question, cohrsework, must be validly obtained; key steps in the working must always be looked at and anything unfamiliar must be investigated thoroughly. Only a small minority of candidates did not understand how to obtain the gradient of the normal, and many obtained schem through marks, at least.