Linear Algebra Zeros

knutarve12

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Feb 13, 2020
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Hello, I need to find the real/complex zeros for the following polynom:

t^9 - 1

Here I also need to use the exponential form of complex numbers
 

Jomo

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I will help you with one of them and then you show your work for the others.
t=1 is a zero.
Did you notice that you have the difference of cubes? Will that help?
 

Subhotosh Khan

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Hello, I need to find the real/complex zeros for the following polynom:

t^9 - 1

Here I also need to use the exponential form of complex numbers
Hint:

Use

cos[2*n*\(\displaystyle \pi \)] + i * sin[2*n*\(\displaystyle \pi \)] = 1
 

Jomo

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Where n is an integer
 

Jomo

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pka

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I need to find the real/complex zeros for the following polynom:
t^9 - 1 Here I also need to use the exponential form of complex numbers
You are asking about the nine ninth roots of \(1\).
9roor.png
These are \(\exp\left(\dfrac{2k i\pi}{9}\right),~k=0,1,\cdots 8\)
 
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