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IF l and m are variable real numbers such that 5l^2-4lm+6m^2+3l=0, then the variable line lx+my=1 always touches a fixed parabola,whose axis is parallel to the X-axis. If (c,d) is the focus of the parabola , then the value of 2^|d-c| is |
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Answer» 1 |
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