If `f(x)` is a decreasing funcion, then the set of values of 'k', for which the major axis of the ellipse `(x^(2))/f(k^(2)+2k+5)+(y^(2))/f(k+11)=1` is the X-axis, is

Consider the ellipse (x^2)/(f(k^2+2k+5))+(y^2)/(f(k+11))=1. If f(x) is a positive decr4easing function, then the set of values of k for which the major axis is the x-axis is (-3,2)dot the set of values of k for which the major axis is the y-axis is (-oo,2)dot the set of values of k for which the major axis is the y-axis is (-oo,-3)uu(2,oo) the set of values of k for which the major axis is the y-axis is (-3,-oo,)

If x=2,y=1 is a solution 3x+2y=k, find the value of k.

The number of real values of k for which the lines (x)/(1)=(y-1)/(k)=(z)/(-1) and (x-k)/(2k)=(y-k)/(3k-1)=(z-2)/(k) are coplanar, is

If f(x)= {(1,-,kx, x,le3),(2x,+,3,x,>3):} is a continuous function, then the value of k is

If x=2k-1 and y=k is a solution of the 3x-5y-9=0 find the value of k.

If x=1,y-2 is a solution of 2x+3y=k, find the value of k.

Find the values of k for which the line (k-3) x -(4 - k^2)y + k^2 -7k + 6 = 0 is Parallel to the x-axis.

Find the values of k for which the line (k-3) x -(4 - k^2)y + k^2 -7k + 6 = 0 is Parallel to the y-axis.

Find the value of k, if x=2,y=1 is a solution of the equation 2x+3y=k.