<ol class="abc-list"><li><div class="list-item-paragraph">Expand \( \left( \mathrm{e} + \frac{1}{\mathrm{e}} \right)^4\) in terms of \(\mathrm{e}\).<span class="inline-marks">[4]</span></div></li><li><div class="list-item-paragraph">Express \( \left( \mathrm{e} + \frac{1}{\mathrm{e}} \right)^4 +  \left( \mathrm{e} - \frac{1}{\mathrm{e}} \right)^4\) as the sum of three terms.<span class="inline-marks">[2]</span></div></li></ol>

Expand \( \left( \mathrm{e} + \frac{1}{\mathrm{e}} \right)^4\) in terms of \(\mathrm{e}\).

Express \( \left( \mathrm{e} + \frac{1}{\mathrm{e}} \right)^4 +  \left( \mathrm{e} - \frac{1}{\mathrm{e}} \right)^4\) as the sum of three terms.

Binomial Theorem

International Baccalaureate Mathematics: Applications and Interpretation Standard Level