If a,b,c are in A.P. and if (b-c)x^2+(c-a)x+a-b=0 and 2(c+a)x^2+(b+c)x=0 have a common root then

JEE Main Mathematics question

If are in A.P. and if and have a common root then

Answer: (B)

The coefficients of the first equation add to , so is a root, and for an A.P. () the other root is also ; so the common root is . The

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Question ID VK-014157