Boy Mow Chau's answer to Tiffany's Junior College 1 H2 Maths Singapore question.
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since you requested only for (iv) & (v), I have omitted workings for (i), (ii) & (iii), but have included the answers so you can check with what you have.
for (iv), if the normals of the 2 planes are not parallel, that the 2 planes cannot be parallel.
for (v) show that P also lies in plane 2; this means that P must lie along L.
the direction vector of L must be perpendicular to the normal of the 2 planes.
for (iv), if the normals of the 2 planes are not parallel, that the 2 planes cannot be parallel.
for (v) show that P also lies in plane 2; this means that P must lie along L.
the direction vector of L must be perpendicular to the normal of the 2 planes.
Date Posted:
4 years ago
sorry, as pointed out by caleb, there is a mistake in the cross product.
to save time, i tend to use cut and paste of working from my other answers, and sometimes, like here, miss out changing some of the numbers.
in the cross product, second row, the -1 should be a 1. so in the result of the cross product, and in the final vector equation, the 7 should be replace by 3.
thanks again to caleb for pointing out the mistake.
to save time, i tend to use cut and paste of working from my other answers, and sometimes, like here, miss out changing some of the numbers.
in the cross product, second row, the -1 should be a 1. so in the result of the cross product, and in the final vector equation, the 7 should be replace by 3.
thanks again to caleb for pointing out the mistake.
It's okay thank youuu
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