Question

find the value of p for which 3x+y=10 and 9x+py=23 have unique solution. ​

Answer 1

heya friend here is ur answer.........
As we know in unique solution a1 /a2 not equal to b1/b2
..........
I hope its help u. ........

Answer 2

As we know the condition for the pair of equations a

1

x+b

1

y+c

1

=0 and a

2

x+b

2

y+c

2

=0 to have a unique solution is -

a

2

a

1



=

b

2

b

1

Here the given system of linear equation is

3x+y=10;

9x+py=23

So for unique solution, we have

9

3



=

p

1

⇒p



=3