If the vectors

MATHEMATICS · Single correct · CBSE · Mathematics · Determinants · Determinants

Problem

If the vectors

p\hat{i} + \hat{j} + \hat{k}

\hat{i} + q\hat{j} + \hat{k}

and

\hat{i} + \hat{j} + r\hat{k}

(Where,

p \neq q \neq r \neq 1

) are coplanar, then the value of

pqr - (p + q + r)

is (1) -2 (2) 2 (3) 0 (4) -1