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If Log

 x (1 / 8) = - 3 / 2, then x is equal to 

A. - 4 
B. 4 
C. 1 / 4 
D. 10

 Dec 5, 2016
 #1
avatar+129852 
0

I assume that this is :

 

 Log x (1 / 8) = - 3 / 2

 

This says that

 

x^(-3/2)  = 1/8   which we can write as

 

x^(3/2)  = 8

              

[ x^(1/2)] ^3  = 8     take the cube root of both sides

 

x^1/2   = 2      square both sides

 

x  = 4

 

 

cool cool cool

 Dec 5, 2016

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