Square Root Symbol
Date: 04/29/2002 at 14:08:55 From: Jason Subject: Radicals Why is there a 2 in the index of a radical? I have searched many books but none of them explain it so I can understand it.
Date: 04/29/2002 at 14:30:18 From: Doctor Ian Subject: Re: Radicals Hi Jason, Do you mean the little two in the crook of the symbol? _____ 2| \ | 8 \| The two indicates a square root; a three would indicate a cube root, _____ 3| \ | 8 \| and in general, _____ n| (1/n) \ | x = x \| Note that if n isn't specified, a default value of 2 is assumed. If you're not familiar with the connection between roots and exponents, take a look at Properties of Exponents http://mathforum.org/library/drmath/view/57293.html Does this help? - Doctor Ian, The Math Forum http://mathforum.org/dr.math/
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994-2013 The Math Forum