a) 20182019 . 20192018 – 20182018 . 20192019 b) ( x + 1 ) + ( x + 2 ) + … + ( x + 100 )

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a) 20182019 . 20192018 – 20182018 . 20192019
b) ( x + 1 ) + ( x + 2 ) + … + ( x + 100 )

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