October 2020 Paper 3 Q1
1 Find the value of \(\displaystyle\sum_{r=1}^{5} 2^r(r-1)\). [2]
| Scheme | Marks | AO |
|---|---|---|
| BC \(2 \times 0 + 4 \times 1 + 8 \times 2 + 16 \times 3 + 32 \times 4\) | M1 | 1.1a |
| 196 | A1 | 1.1 |
| [2] |
Notes
M1: At least two terms written out, allow one error, OR correct answer
Terms may not be seen as may be done completely on calculator