1.

Let y = (x^8 + x^4 + 1)/(x^4 + x^2 + 1). If (dy)/(dx) = ax^3 + bx . Then

Answer»

`a = 4, B = 2`
`a = 4, b = -2`
`a = -2, b = 4`
`a = 2, b = -4`

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