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in Linear Equations by (37.4k points)
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For what value of p will the system of equations 3x + y = 1, (2p – 1)x + (p – 1) y = (2p + 1) has no solution ? 

A) p = 2 

B) p ≠ 2 

C) p = -2 

D) p ≠ -2

2 Answers

+1 vote
by (57.0k points)
selected by
 
Best answer

Correct option is (A) p = 2

Condition to have no solution is

\(\frac{a_1}{a_2}=\frac{b_1}{b_2}\neq\frac{c_1}{c_2}\)

\(\therefore\) \(\frac3{2p-1}=\frac1{p-1}\neq\frac{-1}{-(2p+1)}\)

\(\Rightarrow\) \(\frac3{2p-1}=\frac1{p-1}\)

\(\Rightarrow\) 3 (p - 1) = 2p - 1

\(\Rightarrow\) 3p - 3 = 2p - 1

\(\Rightarrow\) 3p - 2p = 3 - 1

\(\Rightarrow\) p = 2

Hence, for p = 2, the given system of equations has no solution.

+1 vote
by (41.0k points)

Correct option is A) p = 2

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