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Question

If non-zero numbers a,b,c are in H.P., then the straight line xa+yb+1c=0 always passes through a fixed point. That point is :

A
(1,2)
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B
(1,2)
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C
(1,2)
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D
(1,12)
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Solution

The correct option is D (1,2)
As a,b,c are in H.P. 2b1a1c=0
Comparing with xa+yb+1c=0
x1=y2=11=0x=1,y=2
Hence given line must pass through (1,2)

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