What is the distance between the two parallel planes and ?

Answer and explanation

Correct answer: B.

  1. Step 1: Write both plane equations with identical normal coefficients: and .
  2. Step 2: The distance between two parallel planes and is .
  3. Step 3: Here , and . Compute: .
Answer
.
Why not the others: miscalculates as ; subtracts from directly without normalizing coefficients; uses with scaled denominator.

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