I am learning how to find cube roots of a complex number and I wanted to see if I am doing this right. could someone let me know?

find the cube roots of -8i:

Is this good so far? I just done the first one to see if I done it right.

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- Dec 11th 2008, 03:45 PMrobascfind the cube roots
I am learning how to find cube roots of a complex number and I wanted to see if I am doing this right. could someone let me know?

find the cube roots of -8i:

Is this good so far? I just done the first one to see if I done it right. - Dec 11th 2008, 04:06 PMSkalkaz
Dear robasc,

http://www.mathhelpforum.com/math-he...9985f458-1.gif

It's not trully correct. Check it cubing for k=1 or 2. - Dec 11th 2008, 04:09 PMSoroban
Hello, robasc!

I'm pretty sure you've got it right . . . I'll tidy-up a bit just to make sure.

Quote:

Find the cube roots of

.

. . for

Is this good so far? I just done the first one to see if I done it right.

Looks good to me!

- Dec 11th 2008, 04:10 PMrobasc
do you mean check for the rest of them?

- Dec 11th 2008, 04:23 PMSkalkaz
Okey, than you only misspeled the parenthesis but though right.

- Dec 11th 2008, 04:25 PMrobasc
Thanks you friends!