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If A = (1, 2) and B = (3, 4), what is the dot product A · B?
If A = (1, 2) and B = (3, 4), what is the dot product A · B?
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Q1
If A = (1, 2) and B = (3, 4), what is the dot product A · B?
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8
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Dot product A · B = 1*3 + 2*4 = 3 + 8 = 11.
Questions & Step-by-step Solutions
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Q
Q: If A = (1, 2) and B = (3, 4), what is the dot product A · B?
Solution:
Dot product A · B = 1*3 + 2*4 = 3 + 8 = 11.
Steps: 7
Show Steps
Step 1: Identify the components of vector A. A = (1, 2) means A has two components: 1 and 2.
Step 2: Identify the components of vector B. B = (3, 4) means B has two components: 3 and 4.
Step 3: Multiply the first component of A by the first component of B. This is 1 * 3.
Step 4: Multiply the second component of A by the second component of B. This is 2 * 4.
Step 5: Add the results from Step 3 and Step 4 together. This is (1 * 3) + (2 * 4).
Step 6: Calculate the result of Step 5. This is 3 + 8.
Step 7: The final result is 11, which is the dot product A · B.
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