The values of m ,n, for which the system of equations x+y+z=4 ,2x+5y+5z=17 ,x+2y+mz=n has infinitely many solutions, satisfy the equation:

Question

Accepted Answer

Correct answer: A. (a) D= (11125512 m )=0 ⇒m=2 D_3= (114251712n )=0 ⇒n=7

$The values of m, n, for which the system of equations x + y + z = 4, 2 x + 5 y + 5 z = 17, x + 2 y + m z = n has infinitely many solutions, satisfy the equation:$