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If the plane 2x – y + 2z + 3 = 0 has the distances 1/3 and 2/3 units from the planes 4x – 2y + 4z + λ = 0 and 2x – y + 2z + μ = 0,

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If the plane 2x – y + 2z + 3 = 0 has the distances 1/3 and 2/3   units from the planes 4x – 2y + 4z + λ = 0 and 2x – y + 2z + μ = 0, respectively, then the maximum value of λ + μ is eq

(1) 13 (2) 9 (3) 5 (4) 15 

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Correct option (1) 13

Explanation:

Distance formula

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