For any vector x, where i, j, k have their usual meanings the value of have their usual meanings, is equal to
2
3
4
B.
2
Let x =
Then,
Now,
=
=
Similarly,
and
=
=
= 2
If the sum of two unit vectors is a unit vector, then the magnitude of their difference is
units
2 units
units
units
Let f be a non-constant continuous function for all x > 0. Let f satisfy the relation f(ax) f(a-x)=1 for some a R*. Then, I = is equal to
a
f(a)