+16 HI,
This is something that happened in math class today. If you enter the equation, (-27)^(2/3), into your calculator, you will get an error. However, this should not happen. What happens when the equation is expanded and then solved?
(-27)^(2/3)
= ((-27)^(1/3))^2)
= (cubed root (-27)) ^ 2
= (-3) ^ 3
= 9
Using the original equation:
My calculator says, "Domain Error" Turing says, "Attempt to raise a negative number to a real exponent."
it returns 1 in Ruby Google calculator says, "(-27)^(2 / 3) = -4.5 + 7.79422863 i" I thought I would post this on a programming forum because I believe this is programming related and has to do with how calculators deal with powers. Does anyone understand why an error is occurring?
Any help will be apprecited.
I didn't find the right solution from the Internet.
References:
http://compsci.ca/v3/viewtopic.php?t=15472
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Thank you.
