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Question

For which value of p does the equation 4x+py+8=0 and 2x+2y+2=0 have unique solution?

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Solution

Solution:
L1:4x+py+8=0
L2:2x+2y+2=0
For an unique solution,
a1a2b1b2c1c2
so, 42p2
or, p4
Value of p=R{4}

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