Two given points P and Q in the rectangular cartesian co–ordinates lie on y = 2 x + 2…
Mathematics · JEE Advanced · NTA Exams — Three Dimensional Geometry
Two given points P and Q in the rectangular cartesian co–ordinates lie on y = 2x + 2 such that \(\overrightarrow{O P} \cdot \hat{i}=-1\) and \(\overrightarrow{O Q} \cdot \hat{i}=+2\)where \(\hat{\mathrm{i}}\) is a unit vector along the x–axis. The magnitude of \(\overrightarrow{O Q}-4 \overrightarrow{O P}\) will be :
- 10
- 20
- 30
- none
Answer
(A) 10
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