A. 3
B. 2
C. 1
D. 4
3x-5x2+12 has maximum at x=
The cost of a cloth piece is Rs.35/-.If the length of the cloth piece is 4 metres more and each metre costs Rs.1/- less,the cost would remain unchanged.The length of the cloth piece is
If x2-y2+4x-6y+k is resolvable into two linear factors then k=
The expression x2-5x-6 is negative if x lies in
If one root of the equation ax2+bx+c=0 is equal to the nth 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