Wiskunde Multiple Choice Vraag uit Gricha's Wiskundige Vragenbank

$https://latex.codecogs.com/png.image?\dpi{110}\frac{1}{x^{-1}+1}=$	A. 1
	B. x + 1
	C. x
	D. $\boldsymbol{\frac {1\,+\,x} {x} }$
	E. $\boldsymbol{\frac {x} {1\,+\,x} }$

[ 2,3,4-1729 - op net sinds 17.9.09-(E)-30.10.2023 ]

$\large \color{DarkGreen} { \frac{1}{x^{-1}+1}= \frac{1}{\frac{1}{x}+1}= \frac{1}{\frac{1}{x}+\frac{x}{x}}= \frac{1}{\frac{1+x}{x}}= \frac{x}{1+x} }$