If A = (1, 1, 1) and B = (x, y, z) such that A · B = 3, what is the value of x +

Practice Questions

Q1
If A = (1, 1, 1) and B = (x, y, z) such that A · B = 3, what is the value of x + y + z?
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Questions & Step-by-Step Solutions

If A = (1, 1, 1) and B = (x, y, z) such that A · B = 3, what is the value of x + y + z?
  • Step 1: Identify the vectors A and B. A = (1, 1, 1) and B = (x, y, z).
  • Step 2: Understand that A · B means the dot product of A and B.
  • Step 3: Calculate the dot product A · B using the formula: A · B = A1*B1 + A2*B2 + A3*B3.
  • Step 4: Substitute the values from A and B into the formula: A · B = 1*x + 1*y + 1*z.
  • Step 5: Simplify the expression: A · B = x + y + z.
  • Step 6: We know from the question that A · B = 3.
  • Step 7: Set the equation x + y + z = 3.
  • Step 8: The value of x + y + z is therefore 3.
  • Dot Product – The dot product of two vectors A and B is calculated by multiplying corresponding components and summing the results.
  • Vector Components – Understanding how to represent vectors in component form and how to manipulate these components in equations.
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