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Consider two vectors A=3i - 1j and B = - i - 5j, how do you calculate #abs(A+B)#??

1 Answer

Mar 12, 2016

#|A+B|=sqrt40#

Explanation:

#Delta x=A_x+B_x=3-1=2#
#Delta y=A_y+B_y=-1-5=-6#
#|A+B|=sqrt(Delta x^2+Delta y^2)#
#|A+B|=sqrt(2^2+(-6)^2)#
#|A+B|=sqrt(4+36)#
#|A+B|=sqrt40#

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