1103107802

SubArea: 
Primitive function
Level: 
B
Project ID: 
1103107802
Accepted: 
1
What is the color of the graph of a function $F(x)$, that is primitive to the function $f(x)=\frac2{x+1}$ on $(-1;\infty)$? (See the picture.)
yellow
green
blue
red