csat-suneung 2008 Q4

csat-suneung · South-Korea · csat__math-humanities 3 marks Indices and Surds Evaluating Expressions Using Index Laws
When $a = \sqrt { 2 } , b ^ { 3 } = \sqrt { 3 }$, what is the value of $( a b ) ^ { 2 }$? (Here, $b$ is a real number.) [3 points]
(1) $2 \cdot 3 ^ { \frac { 1 } { 3 } }$
(2) $2 \cdot 3 ^ { \frac { 2 } { 3 } }$
(3) $2 ^ { \frac { 1 } { 2 } } \cdot 3 ^ { \frac { 1 } { 3 } }$
(4) $3 \cdot 2 ^ { \frac { 1 } { 3 } }$
(5) $3 \cdot 2 ^ { \frac { 2 } { 3 } }$
When $a = \sqrt { 2 } , b ^ { 3 } = \sqrt { 3 }$, what is the value of $( a b ) ^ { 2 }$? (Here, $b$ is a real number.) [3 points]\\
(1) $2 \cdot 3 ^ { \frac { 1 } { 3 } }$\\
(2) $2 \cdot 3 ^ { \frac { 2 } { 3 } }$\\
(3) $2 ^ { \frac { 1 } { 2 } } \cdot 3 ^ { \frac { 1 } { 3 } }$\\
(4) $3 \cdot 2 ^ { \frac { 1 } { 3 } }$\\
(5) $3 \cdot 2 ^ { \frac { 2 } { 3 } }$