5,6,19,17,( ),-55A.15 B.344 C.343 D.

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5,6,19,17,( ),-55A.15 B.344 C.343 D.

5,6,19,17,( ),-55A.15 B.344 C.343 D.
5,6,19,17,( ),-55A.15 B.344 C.343 D.

5,6,19,17,( ),-55A.15 B.344 C.343 D.
5^2-6=196^2-19=1719^2-17=尾数4B验19^2-17=34417^2-344=-55