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Question

Find the value of k for which the following system of equations has no solution:
kx+3y=3
12x+ky=6

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Solution

Given,

kx+3y=3

12x+ky=6

Condition for equations to have no solutions,

a1a2=b1b2c1c2

k12=3k36

k12=3kk=±6

3k36k6

the given equations have no solutions when k=6

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