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exponents

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Source: — Problem Solving |

by mkdureja » Thu May 23, 2013 11:44 pm
J N wrote:from veritas (problem 56 book 4 pg 189)

making a silly mistake somewhere

if 5 * (125)^(1/3) = 1 / (5^(1/x)) then x=?

5*5*5^(1/x) = 1

5^(1+1+(1/x)) =1

2 +(1/x) = 0

x= -1/2



answer is -4
-1/2 is correct
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by ygdrasil24 » Fri May 24, 2013 1:29 am
-1/2 seems alright.
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