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Question

Find the value of K if (3k+1k+1,4k+2k+1) lies on x + y - 5 = 0


A

2

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B

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C

-2

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Solution

The correct option is B


If (x1,y1) lies on x + y - 5 = 0, x1y1+5=0

Similarly,

3k+1k+1+4k+2k+15=0

k=12


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