<ol class="abc-list"><li><div class="list-item-paragraph">Write down the first three terms of the sequence \(u_n = 3n\), for&nbsp;\(n \geq 1\).<span class="inline-marks">[1]</span></div></li><li><div class="list-item-paragraph">Find<span class="inline-marks">[5]</span></div><ol class="i-list"><li><div class="list-item-paragraph">\( \sum_{n = 1}^{20} {3n} \);</div></li><li><div class="list-item-paragraph">\( \sum_{n = 21}^{100} {3n}\).</div></li></ol></li></ol>

Write down the first three terms of the sequence \(u_n = 3n\), for \(n \geq 1\).

Block Sums

Sequence and Series

International Baccalaureate Mathematics: Applications and Interpretation Standard Level

Sequence and Series - Block Sums

Sequence and Series - Block Sums