Mathematics · Oct / Nov 2020 · Paper 22 · Question 22
0580
As printed in the paper
The question as text
O M A B b a C NOT TO SCALE The diagram shows a triangle OAB and a straight line OAC. OA : OC = 2 : 5 and M is the midpoint of AB. OA a = and OB b = . Find, in terms of a and b, in its simplest form
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22(a)[1]
–a + b [1]
22(b)[3]
2a – 1 2 b [3]
B2 for answer 2a + pb or qa – 1 2 b q ≠ 1 2 or correct unsimplified answer in terms of a and b 3 5
or M1 for AC = a or OC = a or 2 2 correct route If 0 scored
SC1 for answer a + 1 2 b
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