De tweede orde
afgeleide

is gelijk aan
A.  \(\large\boldsymbol{\frac {1} {(x^{-1}\,+\:1)^4} }\)
B.  \(\large\boldsymbol{\frac {2x^3} {(1\,+\,x)^3} }\)
C.  \(\large\boldsymbol{\frac {-2} {(x\,-\,1)^3} }\)
D.  \(\large\boldsymbol{\frac {-2} {(1\,+\,x)^3} }\)
E.  geen van de vorige
A    B    C    D    E

[ 5-1730 - op net sinds 27.3.15-()-2.11.2023 ]

Translation in   E N G L I S H

IN CONSTRUCTION A.  
B.  
C.  
D.  
E.  

Oplossing - Solution

\( D^2\,\frac{1}{x^{-1}+1}=D^2\, \frac{x}{1+x}=D\: \frac{1.(1+x)-x.1}{(1+x)^2} =D\: \frac{1}{(1+x)^2} =-\: \frac{2(1+x)}{(1+x)^4}=\frac{-2}{(1+x)^3} \)
gricha