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Question

What is the equation to the plane through (1,2,3) parallel to 3x+4y−5z=0?

A
3x+4y+5z+4=0
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B
3x+4y5z+14=0
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C
3x+4y5z+4=0
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D
3x+4y5z4=0
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Solution

The correct option is B 3x+4y5z+4=0
The given equation is 3x+4y5z=0
Let the equation of parallel plane be 3x+4y5z=k where k is a constant
The plane passes through the point (1,2,3)
So, 31+4253=k
4=k
So the equation of the plane is 3x+4y5z=4
3x+4y5z+4=0
Option C is true

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