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Q.

Lines ax + by + c = 0 and 3a + 2b + 4c = 0  a,b,c∈R are concurrent at the point.

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a

(3, 2)

b

(2, 4)

c

(3, 4) 

d

(3/4, 1/2)

answer is D.

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Detailed Solution

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3a+2b+4c=0

⇒ 34a+12b+c=0

⇒ax+by+c passes through (3/4, 1/2) for all values of  a, b, c.

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