Find the dot product of the vectors a = (0, 4) and b = (3, -2).
Answer and explanation
Correct answer: A. -8
- Step 1: The dot product is a.b = x1 x2 + y1 y2.
- Step 2: a.b = (0)(3) + (4)(-2) = -8.
Answer
-8.
Why not the others: '12' cross-multiplies the components; '8' subtracts the second product; '-12' gives the 2D cross product.
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