(Merged) Monday 12 May 2025 [VERIFIED]
, 2
Do not write
outside the
box
Answer all questions in the spaces provided.
1 Calculate the product
(3 + i)(2 – i)
Circle your answer.
[1 mark]
5–i 5+i 7–i 7+i
2 The complex number 3 + 5i is a root of the quadratic equation
z2 + az + b = 0
where a and b are real constants.
Find the other root of the equation.
Circle your answer.
[1 mark]
3 – 5i 3 + 5i 5 – 3i 5 + 3i
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, 3
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3 Find the equations of the asymptotes of the curve with equation
(x – 1)(x + 2)
y = (x + 1)(x – 2)
Tick () one box.
[1 mark]
x = 1, x = –2, y = 1
x = 1, x = –2, y = –1
x = –1, x = 2, y = 1
x = –1, x = 2, y = –1
4 Find the first two non‑ zero terms of the Maclaurin series expansion of cos (2x)
Tick () one box.
[1 mark]
1 – x2
1 – 2 x2
2 – x2
2 – 2x2
Turn over U
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, 4
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outside the
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5 The quartic equation
3 x 4 + x 2 – 5x – 11 = 0
has roots α, β, γ and δ
5 (a) Write down the value of αβγδ
[1 mark]
5 (b) Write down the value of αβγ + αβδ + αγδ + βγδ
[1 mark]
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