2015 SRJC P1 Q11 [Modified]
2015 SRJC P1 Q11 [Modified]
Prelims
- Given that \(z={{e}^{\frac{2\mathrm{ }\pi\mathrm{ }}{5}\mathrm{i}}}\), find the smallest positive real number \(n\) for \({{z}^{n}}\) to be purely imaginary.
Video Solution:
Video solution locked
A free account saves your progress; this video needs tuition enrolment.
Solution:
Solution locked
680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs tuition enrolment.
Create a free account to practise similar questions.
Answer:\( n = \frac{5}{4} \)
Need help? Join our JC Math tuition classes.
Learn more