1.

If therootsof x^4 -2x^3 - 21x^2+ 22 x + 40=0are inA.P then therootsare

Answer»

`2/3,-1/2 ,1,2`
`1,+- 2,-3`
`+- SQRT(3) , (3)/(4) ,-1/2`
`-4,-1,2,5`

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