1/[v(2x)+vx] - set10 Q20

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 127
Joined: Tue Oct 02, 2007 9:35 am
Thanked: 1 times

1/[v(2x)+vx] - set10 Q20

by arocks » Sun Oct 07, 2007 5:25 am
If x > 0, then 1/[v(2x)+vx] =

A. 1/v(3x)
B. 1/[2v(2x)]
C. 1/(xv2)
D. (v2-1)/vx
E. (1+v2)/vx

I got A. The OA is D...
Pls. explain. Thanks.