(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose f(z) = z^3 -27z + 15

Find R such that |f(z)|>|z| whenever |z|>R.

2. Relevant equations

3. The attempt at a solution

Let f(z)=z, then I have z^3 -28z + 15 = 0

then,

z=5, (-5+√(17))/2, (-5-√(17))/2.

since 5 is the most further point, R=5.

check my solution if it is right. I did it, but im not so sure.

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# Homework Help: Filled Julia set - check my solution if it is right.

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