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
If the sum of two unit vectors is a unit vector, then the magnitude of their difference is
units
2 units
units
units
Let a and B be the roots of x2 + x + 1 = 0. If n be a positive integer, then is
A.
We have, x2 + x + 1 =
or
=
=
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)