Hey Carlos
You need to think about the rules for exponents. Is there any that tells you how to deal with negative exponents?
Here is a way to think about it. For positive exponents you could write x^n = x*x^(n1), as long as n is greater than 0. This can be rewritten as: x^(n1) = (x^n)/x, as long as x is not 0. Now suppose n is 0, and the rule gives us: x^(1) = x^(0)/x. Since x^0 is 1, this means x^(1) = 1/x. If we assume this holds as long as n is an integer(positive or negative) and x is not 0, then we have that x^(2) = x^(1)/x = ([x^0]/x)/x =(1/x)/x = 1/x^2, and in general x^(n) = 1/(x^n). Then in your case, 4^(4) = 1/(4^4).
From here just multiply to find: 1/(4*4*4*4)=?
Hope this is helpful,
Jose
6/12/2014

Jose S.
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