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Let the line 4x+3y+1=0 meets the parabola 8y2=ax at P,Q. If the angle made by chord PQ at the vertex of the parabola in 90°, then |a|= |
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Answer» Let the line 4x+3y+1=0 meets the parabola 8y2=ax at P,Q. If the angle made by chord PQ at the vertex of the parabola in 90°, then |a|= |
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