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Let [x] be the greatest integer less tha...

Let [x] be the greatest integer less than or equal to x, for a real number x. Then the following sum
`[(2^(2020) + 1)/(2^(2018) + 1)] + [(3^(2020) + 1)/(3^(2018) + 1)] + [(4^(2020 ) + 1)/(4^(2018) + 1)] + [(5^(2020) + 1)/(5^(2018) + 1)] + [(6^(2020)+1)/(6^(2018)+1)]` is

A

80

B

85

C

90

D

95

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