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Let the parabolas y=x(c-x)a n dy=x^2+a x...

Let the parabolas `y=x(c-x)a n dy=x^2+a x+b` touch each other at the point (1,0). Then `a+b+c=0` `a+b=2` `b-c=1` (d) `a+c=-2`

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