<p>The sum, ${{S}_{n}}$, of the first $n$ terms of the sequence ${{u}_{1}}$,${{u}_{2}}$,${{u}_{3}}$ is given by ${{S}_{n}}={{n}^{2}}+4n$.</p>
<ol class="i-list"><li><div class="list-item-paragraph">Find ${{u}_{n}}$ in terms of $n$.</div><p style="text-align: right;">[2]</p></li><li><div class="list-item-paragraph">Hence show that the sequence is an arithmetic progression.</div><p style="text-align: right;">[2]</p></li></ol>

The sum, ${{S}_{n}}$, of the first $n$ terms of the sequence ${{u}_{1}}$,${{u}_{2}}$,${{u}_{3}}$ is given by ${{S}_{n}}={{n}^{2}}+4n$.

Hence show that the sequence is an arithmetic progression.

APGP

H2 Math

International Baccalaureate Higher Level Mathematics

2023 MI PRU1 P1 Q1

2023 MI PRU1 P1 Q1

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