જો રેખાઓની સંહતિ $x+ ay+z\,= 3$ ; $x + 2y+ 2z\, = 6$ ; $x+5y+ 3z\, = b$ ને એકપણ ઉકેલ શકય ન હોય તો . . .
A$a\, = 1$ , $b\,\ne 9$
B$a\,\ne - 1$ , $b\, = 9$
C$a\, = - 1$ , $b = 9$
D$a\, = -1$ , $b\,\ne 9$
JEE MAIN 2018, Diffcult
Download our app for free and get started
D$a\, = -1$ , $b\,\ne 9$
d As the system of equation has no solution then $\Delta $ should be zero and at lest one of ${\Delta _1},{\Delta _2}$ and ${\Delta _3}$ should not be zero.
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*