Unit 1
4 marks · NormalLet be a number such that .
Consider the set , a subset of even numbers.
(a)[2 marks]
Find the value of .
(b)[2 marks]
Write in set notation, using the element symbol and curly brackets.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) 8
(b) T = {10, 12, 14, 16, 18}
Also accept: {10, 12, 14, 16, 18}
Show mark scheme and worked solution
Marking points
M1 (a) · 1 mark · Subtract 5 from both sides
A1 (a) · 1 mark · Correct value found: x = 8
B1 (b) · 2 marks · Correct set notation with braces and commas
Worked solution
a) x + 5 = 13 ⇒ x = 13 − 5 = 8.
b) T = {10, 12, 14, 16, 18}