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Questions  >>  EAMCET  >>  Mathematics
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Q)

If $a \;>\;0$ and $b^2-4ac=0,$ then the curve $y=ax^2+bx+c$

(a) cuts the x-axis

(b) touches the x-axis and lies below it

(c) ties entirely above the x-axis

(d) touches the x-axis and lies above it

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