Lines have only one solution

Lines have infinite solutions

The system of equations (a+1)x+2y-z=1,ay -2z=2 and (a+2)z=3 have only one solution then a=

The system of equations (a+1)x+2y-z=1, ay-2z=2 and (a+2)z=3 have only one solution then a=

The simultaneous equations Kx+2y-z=1, (K-1)y-2z=2 and (K+2)z=3 have only one solution, when

If the equations ax+by=1 and cx^(2)+dy^(2)=1 have only one solution,prove that (a^(2))/(c)+(b^(2))/(d)=1 and x=(a)/(c),y=(b)/(d)

The equation x-(8)/(|x-3|)=3-(8)/(|x-3|) has only one solution (b) infinite solutions no solution (d) none of these

The equation 2x+y+z=0, x+y+z=1, 4x+3y+3z=2 have (A) no solution (B) only one solution (C) infinitely many solutions (D) none of these

The equation 2log(x+3)=log(alphax) has only one solution if

If the equation 2 cos x + cos 2 lambda x=3 has only one solution , then lambda is