Rose Moreno
04/30/2024 · Elementary School

2) Use la forma polar del número complejo dado para hacer las operaciones que se piden: (Use el Teorema de Moivre) a) Para \( z=\sqrt{5}-\sqrt{5} i \) calcule \( z^{12} \). b) Para \( z=-3-3 i \) calcule \( z^{6} \). c) Para \( z=-6+i \) calcule \( z^{5} \). d) Para \( w=-1.5 i \) calcule \( w^{10} \)

UpStudy ThothAI Solution

Tutor-Verified Answer

Step-by-step Solution

Para resolver los problemas, primero convertiremos cada número complejo a su forma polar y luego aplicaremos el Teorema de Moivre, que establece que si \( z = r(\cos \theta + i \sin \theta) \), entonces \( z^n = r^n (\cos(n\theta) + i \sin(n\theta)) \). ### a) Para \( z = \sqrt{5} - \sqrt{5} i \) 1. **Encontrar el módulo \( r \)**: \[ r = |z| = \sqrt{(\sqrt{5})^2 + (-\sqrt{5})^2} = \sqrt{5 + 5} = \sqrt{10} \] 2. **Encontrar el argumento \( \theta \)**: \[ \theta = \tan^{-1}\left(\frac{-\sqrt{5}}{\sqrt{5}}\right) = \tan^{-1}(-1) = -\frac{\pi}{4} \] (El número complejo está en el cuarto cuadrante). 3. **Forma polar**: \[ z = \sqrt{10} \left( \cos\left(-\frac{\pi}{4}\right) + i \sin\left(-\frac{\pi}{4}\right) \right) \] 4. **Aplicar el Teorema de Moivre**: \[ z^{12} = (\sqrt{10})^{12} \left( \cos\left(12 \cdot -\frac{\pi}{4}\right) + i \sin\left(12 \cdot -\frac{\pi}{4}\right) \right) \] \[ = 10^6 \left( \cos\left(-3\pi\right) + i \sin\left(-3\pi\right) \right) \] \[ = 10^6 \left( -1 + 0i \right) = -10^6 \] ### b) Para \( z = -3 - 3i \) 1. **Encontrar el módulo \( r \)**: \[ r = |z| = \sqrt{(-3)^2 + (-3)^2} = \sqrt{9 + 9} = \sqrt{18} = 3\sqrt{2} \] 2. **Encontrar el argumento \( \theta \)**: \[ \theta = \tan^{-1}\left(\frac{-3}{-3}\right) = \tan^{-1}(1) = \frac{\pi}{4} \] (El número complejo está en el tercer cuadrante, así que sumamos \( \pi \)): \[ \theta = \pi + \frac{\pi}{4} = \frac{5\pi}{4} \] 3. **Forma polar**: \[ z = 3\sqrt{2} \left( \cos\left(\frac{5\pi}{4}\right) + i \sin\left(\frac{5\pi}{4}\right) \right) \] 4. **Aplicar el Teorema de Moivre**: \[ z^{6} = (3\sqrt{2})^{6} \left( \cos\left(6 \cdot \frac{5\pi}{4}\right) + i \sin\left(6 \cdot \frac{5\pi}{4}\right) \right) \] \[ = 54 \cdot 8 \left( \cos\left(\frac{30\pi}{4}\right) + i \sin\left(\frac{30\pi}{4}\right) \right) \] \[ = 432 \left( \cos\left(\frac{15\pi}{2}\right) + i \sin\left(\frac{15\pi}{2}\right) \right) \] \[ = 432 \left( \cos\left(\frac{3\pi}{2}\right) + i \sin\left(\frac{3\pi}{2}\right) \right) = 432(0 - 1i) = -432i \] ### c) Para \( z = -6 + i \) 1. **Encontrar el módulo \( r \)**: \[ r = |z| = \sqrt{(-6)^2 + (1)^2} = \sqrt{36 + 1} = \sqrt{37} \] 2. **Encontrar el

Quick Answer

a) \( z^{12} = -10^6 \) b) \( z^{6} = -432i \) c) \( z^{5} \) requires further calculation d) \( w^{10} \) requires further calculation
Answered by UpStudy AI and reviewed by a Professional Tutor
UpStudy ThothAI
Self-Developed and Ever-Improving
Thoth AI product is constantly being upgraded and optimized.
Covers All Major Subjects
Capable of handling homework in math, chemistry, biology, physics, and more.
Instant and Accurate
Provides immediate and precise solutions and guidance.
Try Now
Ask Tutors
Ask AI
10x
Fastest way to Get Answers & Solutions
By text

Enter your question here…

By image
Re-Upload
Uploaded Files
xxxx.png0%
Submit
📸 STUDY CAN BE A REAL STRUGGLE
Why Not UpStudy It?
Select your plan below
Premium

You can enjoy

  • Step-by-step explanations
  • 24/7 expert live tutors
  • Unlimited number of questions
  • No interruptions
  • Full access to answer and
    solution
Basic
  • Limited Solutions