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3. Pair of Linear Equations in Two Variables
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Q4 of 29 Page 3

If the lines 3x + 2 ky = 2 and 2x + 5y + 1 = 0 are parallel, then find value of k.

3x + 2 ky – 2 = 0


2x + 5y + 1 = 0


Here a1 = 3, a2 = 2


b1 = 2k, b2 = 5


c1= –2, c2 = 1


Now,





For parallel lines


So,



Hence


,




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Find the value of k for which pair of linear equations 3x + 2y = –5 and x – ky = 2 has a unique solution.

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Questions · 29
3. Pair of Linear Equations in Two Variables
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