If alpha and beta are the root of the equation 2x²-x-1=0. find the value of. i)alpha²+beta². ii)alpha/betq+beta/alpha. iii)alpha-beta iv)alpha²/beta+beta²/alpha, v)alpha+1/beata,1/alpha/beta vi)alpha⁴+beata⁴ vii)alpha³/beta +beta³+alpha
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