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What is the dot product of # (-300i + 200j - 150k)# and #(i + j -7k)#?

1 Answer

Dec 2, 2016

#A*B=950#

Explanation:

#A=(ai+bj+ck)#

#B=(di+ej+fk))#

#A*B=a*d+b*e+c*f#

#A*B=((-300*1)+(200*1)+(-150*(-7)))#

#A*B=-300+200+1050#

#A*B=950#

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