17N.1.SL.TZ0.S_2

pestleMathematicsAASLPaper 117N· sl-1-2-arithmetic-sequences-and-seriessource ↗

In an arithmetic sequence, the first term is 8 and the second term is 5.

Find the common difference.

[2]

Find the tenth term.

[2]

Markscheme / solution

* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.

subtracting terms (M1)

eg $\,\,\,\,\,$ $5 - 8,{\text{ }}{u_2} - {u_1}$

$d = - 3$ A1 N2

[2 marks]

correct substitution into formula (A1)

eg $\,\,\,\,\,$ ${u_{10}} = 8 + (10 - 1)( - 3),{\text{ }}8 - 27,{\text{ }} - 3(10) + 11$

${u_{10}} = - 19$ A1 N2

[2 marks]

Examiners’ report

[N/A]