00:01
Hello students for the first question given a equal to 5 ,3, -3 and b equal to 0 ,2 ,2 and c equal to 5, -3 ,6 and we need to find the volume of the parallelepiped determined by the vectors a ,b ,c.
00:21
Now the volume of the parallelepiped will be calculated by the formula a dot b cross c that will be equal to box product a ,b ,c and that will be equal to determinant of all the vectors that is 5 ,3, -3 ,0 ,2 ,2 ,5, -3 ,6.
00:52
Now expand the determinant that is equal to 5 into 12 plus 6 minus 3 into 0 minus 10 minus 3 into 0 minus 10.
01:03
This will be equal to 90 plus 30 plus 30 that is equal to 150.
01:10
Hence the volume of the parallelepiped is equal to 150 cubic units and for the second question we need to find the point which the line intersect the given plane that is x is equal to 2 minus 2t this is equation number 1, y equal to 3t this is equation number 2 and z equal to 1 plus t this is equation number 3 and the line is x plus 2y minus z is equal to 4.
02:06
Consider this as equation number 4...