Solutions - Math Sl - Nov. 2010 P1 - 3931 Words

N10/5/MATME/SP1/ENG/TZ0/XX/M MARKSCHEME November 2010 MATHEMATICS Standard Level Paper 1 18 pages –2– N10/5/MATME/SP1/ENG/TZ0/XX/M This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of the International Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IB Cardiff. –3– N10/5/MATME/SP1/ENG/TZ0/XX/M Instructions to Examiners Abbreviations M (M) A (A) R N AG Marks awarded for attempting to use a correct Method; working must be seen. Marks awarded for Method; may be implied by correct subsequent working. Marks awarded for an Answer or for Accuracy; often dependent on preceding M marks.†¦show more content†¦(Example 2) Must be seen marks appear without brackets e.g. M1. ï‚ · Must be seen marks can only be awarded if appropriate work is seen. ï‚ · If a must be seen mark is not awarded because work is missing (as opposed to M0 or A0 for incorrect work) all subsequent marks may be awarded if appropriate. 5 Follow through marks (only applied after an error is made) Follow through (FT) marks are awarded where an incorrect answer from one part of a question is used correctly in subsequent part(s) or subpart(s). Usually, to award FT marks, there must be working present and not just a final answer based on an incorrect answer to a previous part. However, if the only marks aw arded in a subpart are for the answer (i.e. there is no working expected), then FT marks should be awarded if appropriate. ï‚ · Within a question part, once an error is made, no further A marks can be awarded for work which uses the error, but M marks may be awarded if appropriate. (However, as noted above, if an A mark is not awarded because work is missing, all subsequent marks may be awarded if appropriate.) ï‚ · If the question becomes much simpler because of an error then use discretion to award fewer FT marks. ï‚ · If the error leads to an inappropriate value (e.g. probability greater than 1, use of r ï€ ¾ 1 for the sum of an infinite GP, sin ï  ± ï€ ½ 1.5 , non integer value where integer required), do not award the mark(s) for the final answer(s).