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Find d(A.B) if the coordinates of point A are (1,8) and the coordinates of B are (-8,6).

A) -40
B) -22
C) 40
D) 22

User Kingalione
by
8.8k points

1 Answer

2 votes

Final answer:

The dot product d(A.B) of two vectors A and B is found by multiplying the corresponding components of the vectors and adding them up. For the given coordinates of point A and point B, d(A.B) = 40.

Step-by-step explanation:

To find the dot product d(A.B) of two vectors A and B, we multiply the corresponding components of the vectors and add them up.

The coordinates of point A are (1,8) and the coordinates of point B are (-8,6).

So, d(A.B) = (1)(-8) + (8)(6) = -8 + 48 = 40.

Therefore, the correct answer is C) 40.

User Fatihk
by
8.4k points

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