Re: Having trouble with 92...
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Xavier Scott wrote:
>
> When I put in (-27)^(1/3) and press enter, I get the following
> answer:
>
> 3/2+3*sqrt(3)/2*i.
>
> What's with that? I know the answer is supposed to be -3. Can anyone
> tell me whay it is doing this?
>
> Concerned Calculus Student-> Scott Johnson
Here's the explanation for the '92 doing this. When you put the -27 in
parenthesis, you indicate to the calc that -27 is a complex
number/polynomial,
so instead of treating your request as a "real" cube, it will give you
the
answer as a complex number.
The point being, only use () when you absolutely have to.
<pre>
--
Tim Finnegan
</pre>
References: