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Given $3{ e }^{ i\cfrac { \pi }{ 4 } }\;$, what is the exact standard form of the expression?

A

$\cfrac { \sqrt { 2 } }{ 2 } +i\cfrac { \sqrt { 2 } }{ 2 }$

B

$-\cfrac {3 \sqrt { 2 } }{ 2 } -i\cfrac {3 \sqrt { 2 } }{ 2 }$

C

$\cfrac { 3 }{ 2 } +\cfrac { 3 }{ 2 } i$

D

$\cfrac {3 \sqrt { 2 } }{ 2 } +i\cfrac { 3\sqrt { 2 } }{ 2 }$

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