If one root of the equation ax²+bx+c=0 is equal to the n^th power of the other then (acⁿ)^1/n+1+(aⁿc)^1/n+1+b=

If the sum of the roots of the equation 5x²-4x+2+k(4x²-2x-1)=0 is 6,then k=

The least integral value of x for which 33-x(2+3x)>0 is

If the tangent  at the point  P (2,4) to the parabola y²= 4ax meets the parabola y²= 8x + 5 at Q and R, then the midpoint of QR is