Wiskunde Multiple Choice Vraag uit Gricha's Wiskundige Vragenbank

Welk getal is niet gelijk aan de vier overige ?	A. $\boldsymbol{2^{-\,\frac 12} }$
	B. $\boldsymbol{\frac {1} {\sqrt 2} }$
	C. $\boldsymbol{\sqrt{\frac 12} }$
	D. $\boldsymbol{\frac {\sqrt 2} {2} }$
	E. $\boldsymbol{2^{0,5} }$

[ 5-0390 - op net sinds 4.2.13-(E)-3.11.2023 ]

Translation in E N G L I S H

Which number is not equal to the other four ?	A. $\boldsymbol{2^{-\,\frac 12} }$
	B. $\boldsymbol{\frac {1} {\sqrt 2} }$
	C. $\boldsymbol{\sqrt{\frac 12} }$
	D. $\boldsymbol{\frac {\sqrt 2} {2} }$
	E. $\boldsymbol{2^{0,5} }$

Oplossing - Solution

$https://latex.codecogs.com/png.image?\dpi{110}\\A\mapsto\; 2^{-\frac12}=\frac{1}{2^\frac12}=\frac{1}{\sqrt2}\\B\mapsto\; \frac{1}{\sqrt2}\\C\mapsto\; \sqrt{\frac{1}{2}}=\frac{\sqrt1}{\sqrt2}=\frac{1}{\sqrt2}\\D\mapsto\; \frac{\sqrt2}{2}=\frac{\sqrt2.\sqrt2}{2.\sqrt2}=\frac{2}{2.\sqrt2}=\frac{1}{\sqrt2}\\E\mapsto\; 2^{0,5}=\sqrt2$

Welk getal is niet gelijk aan de vier overige ?	A. \(\boldsymbol{2^{-\,\frac 12} }\)
	B. \(\boldsymbol{\frac {1} {\sqrt 2} }\)
	C. \(\boldsymbol{\sqrt{\frac 12} }\)
	D. \(\boldsymbol{\frac {\sqrt 2} {2} }\)
	E. \(\boldsymbol{2^{0,5} }\)

Which number is not equal to the other four ?	A. \(\boldsymbol{2^{-\,\frac 12} }\)
	B. \(\boldsymbol{\frac {1} {\sqrt 2} }\)
	C. \(\boldsymbol{\sqrt{\frac 12} }\)
	D. \(\boldsymbol{\frac {\sqrt 2} {2} }\)
	E. \(\boldsymbol{2^{0,5} }\)