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What will be the value of m if the vector is perpendicular to ?
What will be the value of m if the vector $2\hat{i} + m\hat{j} + \hat{k}$ is perpendicular to $2\hat{i} - \hat{j} + 3\hat{k}$?
- (a)7
- (b)0
- (c)1
- (d)-1
Answer
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From ISC 2022 Specimen Mathematics Paper 1, question 24.