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Question

If α and β are roots of ax2+bx+c=0, then equation whose roots are α+1β,β+1α, is

A
acx2b(ac)x+(a+c)2=0.
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B
acx2+b(a+b)x(bc)2=0.
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C
acx2+b(a+c)x+(a+c)2=0.
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D
None of these
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Solution

The correct option is B acx2+b(a+c)x+(a+c)2=0.
Given: α,β are roots of ax2+bx+c=0
let y=α+1β
y=αβ+1β
β=a+cay
a(a+cay)2+b(a+cay)+c=0
(a+c)2ay2+b(a+c)ay+c=0
acy2+b(a+c)y+(a+c)2=0
Hence, option C.

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