[" If "a=(1)/(sqrt(10))(3i+k)" and "b=(1)/(7)(2i+3j-6k)" ,"],[" then the value of "(2a-b)*[(a times b)times(a+2b)]" is "],[[" (a) "3," (b) "-5],[" (c) "-3," (d) "5]]

If bar(a)=(1)/(sqrt(10))(3hat(i)+hat(k)) and bar(b)=(1)/(7)(2hat(i)+3hat(j)-6hat(k)) then the value of (2bar(a)-bar(b)*((bar(a)timesbar(b))times(bar(a)+2bar(b))} is equal to

(1)/(sqrt(10))(3hat j+hat k) and vec b=(2hat i+3hat j-6hat k) then the value of (2vec a-vec b)*[(vec a xxvec b)xx(vec a+2vec b)] is:

If vec a = 1/sqrt10 (3i+k) and vec b = 1/7 (2i+3j-6k) then the value of (2 vec a - vec b) . [(vec a xx vec b) xx vec a+ (vec a xx vec b) xx 2 vec b] is

If vec(A)=-hat(i)+3hat(j)+2hat(k) and vec(B)=3hat(i)+2hat(j)+2hat(k) then find the value of vec(A) times vec(B) .

If a = 2i + 5j + 6k, b = -2i + 3j + 2k then the magnitude of a - b is