If |(2 i+j-k) (5 -6 i+j)|=17 then the value of is - Vidyadip

MCQ

If $|(2 \hat{i}+\hat{j}-\hat{k}) \times(5 \lambda-6 i+j)|=17$ then the value of $\lambda$ is

A
5
B
12
C
10
D
none of the above

✓

Answer

self

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