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The straight line a x+b y+c=0 , where a ...

The straight line `a x+b y+c=0` , where `a b c!=0,` will pass through the first quadrant if `a c >0,b c >0` `c >0a n db c<0` `b c >0` and/or `a c >0` (d) `a c<0` and/or `b c<0`

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