Let a vector a be coplanar with vectors b =2 i + j + k and c = i - j + k . If a is perpendicular to d =3 i +2...

Question

Let a vector a be coplanar with vectors b =2 i + j + k and c = i - j + k . If a is perpendicular to d =3 i +2 j +6 k , and | a |= 10 . Then a possible value of [ a b c ]+[ a b d ]+[ a c d ] is equal to -

Accepted Answer

(D)

JEE Main 2021 Mathematics question

Solution