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Question

The equation of the straight line which passes through the point (1, - 2) and cuts off equal intercepts from axes, is

A
x+y=1
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B
x-y=1
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C
x+y+1=0
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D
x-y-2=0
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Solution

The correct option is C x+y+1=0
The equation of line which cuts off equal intercepts from axes a (say) is xa+ya=1 or x+y=a
But it is passes through (1, -2), therefore 12=aa=1.
Hence the equation of straight line is x+y+1=0 .

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