Q5 of 51 Page 26

Find the value of λ so that the following vectors are coplanar.

Formula : -





Given: -



we know that vector are coplanar if their scalar triple product is zero



we have



now, using



⇒ 0 = 1(2 λ – 2) – 2(6 – 1) – 3(6 – λ)


⇒ 0 = 5 λ – 30


⇒ λ = 6


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