Wiskunde Multiple Choice Vraag uit Gricha's Wiskundige Vragenbank

$https://latex.codecogs.com/png.image?\dpi{110}\frac{2}{\frac 17 + \frac 13}$ is gelijk aan	A. 10
	B. 20
	C. 2,1
	D. 4,2
	E. 5

[ 1-5872 - op net sinds 7.6.13-(E)-30.10.2023 ]

Translation in E N G L I S H

$https://latex.codecogs.com/png.image?\dpi{110}\frac{2}{\frac 17 + \frac 13}$ is equal to	A. 10
	B. 20
	C. 2.1
	D. 4.2
	E. 5

Oplossing - Solution

$\large \color{DarkGreen} { \frac{2}{\frac{1}{7}+\frac{1}{3}}= \frac{2}{\frac{3}{21}+\frac{7}{21}}= \frac{2}{\frac{10}{21}}= 2\cdot \frac{21}{10}= \frac{42}{10}= \cdots }$