If alpha and beta are the roots of the e...

If `alpha` and `beta` are the roots of the equation `x^(2)+10x-7=0` then the value of `(alpha^(12)+beta^(12)-7(alpha^(10)+beta^(10)))/(2(alpha^(11)+beta^(11)))` is
(1) `5`
(2) `-5`
(3) `10`
(4) `-10`

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