Surds and Indices - Arithmetic Aptitude Questions and Answers

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If $[\frac { a } { b }]^X-1$ = $[\frac { b} { a }] ^X-3$ , then the value of x is

$[\frac { 1 } { 2 } ]$

$[\frac { 7 } { 2 } ]$

Answer : Option C

Explanation :

Given ^{$[\frac { a } { b } ]^X-1$ = _{$[\frac {b} {a}]^X-3$}}

^{$[\frac { a } { b } ]^X-1$}^{= $[\frac { a } { b }]^(X-3)$}= $[\frac {a } { b } ]^(3-X)$