The coefficient of the quadratic equation `a x^2+(a+d)x+(a+2d)=0` are consecutive terms of a positively valued, increasing arithmetic sequence. Then t
The coefficient of the quadratic equation `a x^2+(a+d)x+(a+2d)=0` are consecutive terms of a positively valued, increasing arithmetic sequence. Then the least integral value of `d//a` such that the equation has real solutions is __________.
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