If the vector is perpendicular to the vector

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

If the vector 2i^+3j^+8k^2\hat{i}+3\hat{j}+8\hat{k} is perpendicular to the vector 4i^−4j^+αk^4\hat{i}-4\hat{j}+\alpha\hat{k}, then the value of α\alpha is (1) −1-1 (2) 12\frac12 (3) −12-\frac12 (4) 11

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