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Question

The three planes 4y+6z=5, 2x+3y+5z=5, 6x+5y+9z=10

A
meet in a point
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B
have a line in common
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C
form a triangular prism
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D
meet at infinite number of points
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Solution

The correct option is D have a line in common
Given three planes are 4 y+6z=5, 2x+3y+5z=5, 6x+5y+9z=10
Determinant of coefficient of the given planes is,
=∣ ∣046235659∣ ∣=4(1830)+6(1018)=0
Therefore, given planes have a line in common.

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