Mathematics · Oct / Nov 2023 · Paper 11 · Question 1
YMA01
As printed in the paper
The question as text
1. Given that 3 3 y 5 x 7 x x > 0 2 x find, in simplest form,
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
1(a)[3]
3
3
3
2
y
=
5
x
+
−
7
x
=
5
x
+
3
x
−
−
7
x
x
2
d
y
15
2
6
3
7
=
x
−
x
−
−
d
x
1(b)[2]
2
d
y
=
30
x
+
18
x
−
4
d
x
2
Do not be concerned by the labelling of their answers in part (a) or part (b)
(a)
...
3
→
...
2
...
−
2
→
...
−
3
±
7
→±
M1:
Decreases the power by 1 on one of the terms
x
x
x
x
x
The index does not have to be processed. e.g.
...
3
→
...
x −
3 1
x
A1:
Two correct unsimplified terms (indices must be processed). May be seen on different lines
or listed. Condone
7x as an unsimplified term. Do not withhold this mark if there is a
0
present.
A1:
or simplified equivalent. Condone any spurious notation around the
15
x
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