TS EAMCET 4 May 2018 Shift 1 Solved Paper

Consider the given system of equations.
x+y+z=9
2x+5y+7z=52
x+7y+11z=77
The above equation can be written as,
Δ=|

1	1	1
2	5	7
1	7	11

|
=55+7+14−5−49−22
=0
Also,
Δ1=|

9	1	1
52	5	7
77	7	11

|
=495+539+364−385−441−572
=0
Also,
Δ2=|

1	9	1
2	52	7
1	77	11

|
=33−135+102
=0
And,
Δ3=|

1	1	9
2	5	52
1	7	7

|
=21−102+81
=0
Therefore, the system of equation has infinitely many solutions.