If the slope of one of the lines represented by 4ax2+xy+4y2=0 is the square of the other then a equals :
18
14
−14
−18
If {x} represents the fractional part of x, then {52008} is
If the slope of one of the lines represented by ax2+2hxy+by2=0 is the square of the other, then a+bh+8h2ab is equal to