MHT CET 2023 Mathematics question

The mirror image of P (2, 4, -1) in the plane x - y + 2z - 2 = 0 is (a, b, c), then the value of a + b + c is

Answer: (D)

Solution

For the plane the normal is with . Value of the plane expression at : . The image is . (Check: the midpoint

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Question ID VK-098212