a) Show that the two planes r= (3,0,2)+1(1,2,-1)+ s(4,-2,-5) and 12x-y+10z-9= 0 are parallel. b) Show that the line r = (-1,-3,1)+(3,4,3) is parallel to the plane- r = (9,-2,-7)+(2,1,3)+ s(1,-2,3).

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Magnitude

A vector is an element with both direction and magnitude. A vector is represented using an arrow, where the arrow represents the direction of the vector and its length is represented using the magnitude. The set of vectors in space is known as vector space. The vectors can be added, subtracted, multiplied, and divided in a vector space. The image below shows a vector AB.