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