For which λ are 2 i + λ j + k and i - 2 j + 3 k perpendicular?

Vectors · Question 68 of 125

Question 68

MediumOriginal question

For which $\lambda$ are $2\hat{i} + \lambda\hat{j} + \hat{k}$ and $\hat{i} - 2\hat{j} + 3\hat{k}$ perpendicular?

- \frac{5}{2}

Correct answerYour answer

\frac{1}{2}

Correct answerYour answer

\frac{5}{2}

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5

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Worth noting

$-\frac{5}{2}$ loses the sign of the $-2\lambda$ term.

Ten questions from Vectors, at your own pace.

Ten questions from Vectors, at your own pace.