6. The number of common points of the curves $y=(x-1)^{4}, y=2^{1 x i}-2$ is ( )
A. 1
B. 2
C. 3
D. 4
6. D

Observe the graph, there are 2 intersection points, but note that when $x \rightarrow+\infty$ or $x \rightarrow-\infty$, we have $2^{|x|} - 2 > (x-1)^{4}$, hence there are 2 additional intersection points at a greater distance.