For
the direction of 1*v*,
we have λ = 1, which is greater than zero, so
the vector 1*v* will be in
the same direction as *v*.

The
magnitude of 1*v* will be |1| times the magnitude of *v*.
In other words,

||1*v*||
= |1| ||*v|*|
= ||*v|*|, which is the magnitude of *v*.

So
1*v*
is a vector with the same magnitude and direction as *v*;
hence it is equal to *v*.

#29.