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If (2hat (i) + 6 hat (j) + 27 hat (k) )x...

If `(2hat (i) + 6 hat (j) + 27 hat (k) )xx (hat (i) + 3hat (j) + p hat (k)) = vec(0) ` , find p

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Let vec(a) = hat(i) + 2hat(j) + 3hat(k) , vec(b) = 2hat(i) + hat(j) + hat(k), vec(c) = 3hat(i) + 2hat(j) + hat(k) and vec(d) = 3hat(i) - hat(j) - 2hat(k) , then . If vec(a) xx (vec(b) xx vec(c)) = pvec(a) + qvec(b) + rvec(c) , then find value of p,q are r.