If the system of equations `2x+3y=7,\ \ \ \ (a+b)x+(2a-b)y=21` has infinitely many solutions, then

If the system of equations 2x+3y=7,\ \ \ 2a x+(a+b)y=28 has infinitely many solutions, then (a) a=2b (b) b=2a (c) a+2b=0 (d) 2a+b=0

If the system of equations 2x+3y=5,\ \ \ \ 4x+k y=10 has infinitely many solutions, then k= (a) 1 (b) (c) 3 (d) 6

Write the value of k for which the system of equations 2x-y=5,\ \ 6x+k y=15 has infinitely many solutions.

If the system of equations x+y+z=2 2x+4y-z=6 3x+2y+lambdaz=mu has infinitely many solutions, then :

Write the value of k for which the system of equations 3x-2y=0 and k x+5y=0 has infinitely many solutions.

The value of k for which the system of equations 2x+3y=5,\ \ \ \ 4x+k y=10 has infinite number of solutions, is (a) 1 (b) 3 (c) 6 (d) 0

Number of triplets of a, b & c for which the system of equations, ax - by = 2a - b and (c +1)x+cy = 10-a + 3 b has infinitely many solutions and x = 1. y = 3 is one of the solutions, is: (A) exactly one (B) exactly two (C) exactly three (D) infinitely many

For what value of k does the system of linear equations 2x+3y=7 and (k-1)x + (k+2)y =3k have an infinite number of solutions

Show graphically that the system of equations 3x-y=2 9x-3y=6 has infinitely many solutions.

The number of values of k for which the system of the equations (k+1)x+8y=4k and k x+(k+3)y=3k-1 has infinitely many solutions is 0 b. 1 c. 2 d. infinite