1.

For what values of p does the pair of equations 4x + py + 8 = 0 and 2x + 2y + 2 = 0 has unique solution?

Answer»

\(\frac{a1}{a2}\) ≠ \(\frac{b1}{b2}\) is the condition for the given pair of equations to have unique solution.

\(\frac{4}{2}\) ≠ \(\frac{p}{2}\)

p ≠ 4

Therefore, for all real values of p except 4, the given pair of equations will have a unique solution.



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