What should not be the value of p for the pair of equations given below to have unique solution? 4x+py+8=0 2x+2y+2=0

# What should not be the value of p for the pair of equations given below to have unique solution?

1. A
1
2. B
2
3. C
3
4. D
4

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### Solution:

Given pair of linear equations are   and  . We need to find what value should p not have, so that the given equations have unique solution.
A system of linear equations   and   will have unique solutions when  .
Now from equations   and  , we have,
and
Now, equation the values in the condition, we have,

Thus, the value of p should not be 4 for the equations to have unique solution.
Therefore, option 4 is correct.

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