Evaluate :
`0.overline(8) + 4.overline(7) - 2.overline(4)`

0.overline(68) + 0. overline(73) = ?

The value of [[overline(a)-overline(b), overline(b)-overline(c), overline(c)-overline(a)]] where |overline(a)|=1, |overline(b)|=2 and |overline(c)|=3 is

If overline(a), overline(b), overline(c) are position vectors of points A, B, C respectively such that 5overline(a)-3overline(b)-2overline(c)=0 , then

Let overline a be vectors parallel to line of intersection of planes p_1 and p_2 through origin. If p_1 is parallel to the vectors 2overline j + 3 overline k and 4overline j - 3 overline k and p_2 is parallel to overline j - overline k and 3overline i - 3overline j, then the angle between overline a and 2overline i + overline j - 2overlinek is (A) pi/2 (B) pi/4 (C) pi/3 (D) pi/6

If ABCD is a quadrilateral, then 2overline(AB)+3overline(BC)+2overline(CD)+overline(DA)+overline(CA)+overline(DB)=

0.overline(142857 ) + 0.overline(285714 ) is equal to

If overline(a) is perpendicular to overline(b) and overline(c), |overline(a)|=2, |overline(b)=3, |overline(c)|=4 and the angle between overline(b) and overline(c) is (2pi)/(3) , then |[[overline(a), overline(b), overline(c)]]|=