Practice — what type is this question? (Patterns Sequences Series)
Read each question and decide what type it is before revealing the answer.
Grade 12Paper 1Level 2 — Routine Procedures
2.2 The sequence 35 ; 28 ; 21 ; ... is an arithmetic sequence. Determine which term of the sequence is equal to −140.
Source: DBE Mathematics Paper 1, November 2018, Question 2.2
Grade 12Paper 1Level 2 — Routine Procedures
2.2 Given the geometric series: 5/8 + 5/16 + 5/32 + ... = K 2.2.1 Determine the value of K if the series has 21 terms.
Source: DBE Mathematics Paper 1, November 2019, Question 2.2.1
Grade 12Paper 1Level 3 — Complex Procedures
3.1 Without using a calculator, determine the value of: Σ(y=3 to 10) 1/(y − 2) − Σ(y=3 to 10) 1/(y − 1)
Source: DBE Mathematics Paper 1, November 2019, Question 3.1
Grade 12Paper 1Level 3 — Complex Procedures
2.1 Given the quadratic sequence: 321 ; 290 ; 261 ; 234 ; ... 2.1.2 Determine the general term of the sequence in the form Tn = an² + bn + c.
Source: DBE Mathematics Paper 1, November 2019, Question 2.1.2