Question:If x, y, z are real numbers then the value of 

A xyz 
B `sqrt(xyz)` 
C `1/(xyz)` 
D 1 

+ Answer
D 

+ Explanation
`sqrt(x^(-1  y) . sqrt(y^(-1)  z . sqrt(z^(-1) x`

`= sqrt(x/y) . sqrt(z/y) . sqrt(x/z)`

`= sqrt(y)/sqrt(x) xx sqrt(z)/sqrt(y) xx sqrt(x)/sqrt(z)`

`= 1`

+ Report

Irin Moni

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