Mathematics · Oct / Nov 2020 · Paper 42 · Question 7
0580
As printed in the paper
The question as text
, y x x x 1 0 2 ! = +
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
7(a)[2]
2, 4.5 [2]
B1 for each
7(b)[4]
Correct graph 6 6 6 6 4 4 4 4 2 2 2 2 -2 -2 -2 -2 -1 -1 -1 -1 0 0 0 0 0 0 0 0 1 1 1 1 2 2 2 2 -2 -2 -2 -2 -4 -4 -4 -4 [4]
B3 FT for 6 or 7 correct points FT their table or B2 FT for 4 or 5 correct points FT their table or B1 FT for 2 or 3 correct points FT their table
7(c)(i)[1]
–0.5 to –0.4 [1]
7(c)(ii)[2]
y = 1 – x ruled and –1.9 to –1.75 [2]
M1 for [y =] 1 – x or 1 2 x + = 1 − x soi x
or B1 for –1.9 to –1.75
7(d)[1]
Any integer > 2 [1]
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