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1 + frac(1)(2) + frac(1) (4) + frac(1)(7...

`1 + frac(1)(2) + frac(1) (4) + frac(1)(7) + frac(1)(14) + frac(1)(28)` is equal to

A

2

B

2.5

C

3

D

3.5

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