l
1
=
(
v
−
u
)
t
2
l
1
=
(
v
−
u
)
t
2
Close
Log in
Books
Repository
eAnswer
ePortfolio
Close
Log in
Books
Repository
eAnswer
ePortfolio
Log in
New user
OK
Error
Forgot?
Log in
Register
Recover
OK
Error
Change