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Question

There is (are) ________ value(s) of c for which the pair of equations cx – y = 2 and 6x – 2y = 3 have infinitely many solutions.

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Solution

If the system of equations a1x+b1y+c1=0 and a2x+b2y+c2=0 has infinitely many solutions, then a1a2=b1b2=c1c2.

Since, the system of equations cx – y = 2 and 6x – 2y = 3 has infinitely many solutions
Therefore,
c6=-1-2=-2-3c6=12=23But, 1223

Therefore, for no value of c the pair of equations cx – y = 2 and 6x – 2y = 3 have infinitely many solutions.

Hence, there is (are) no value(s) of c for which the pair of equations cx – y = 2 and 6x – 2y = 3 have infinitely many solutions.


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