ln which of the following point lies in a fourth octant?
(1 , 2, 3) , (4, -2 ,3) , (4 ,-2 ,-5) and (4 ,2, - 5)

Easy

Solution

Point Octant
(1 ,2,3) I (all the coordinates are positive)
(4,-2,3) lV (y-coordinate is negative)
(4 ,-2 ,-5) Vlll (y and z-coordinates are negative)
(4 ,2, - 5) V (z-coordinate is negative)

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Point	Octant
(1 ,2,3)	I (all the coordinates are positive)
(4,-2,3)	lV (y-coordinate is negative)
(4 ,-2 ,-5)	Vlll (y and z-coordinates are negative)
(4 ,2, - 5)	V (z-coordinate is negative)