2=1^3+1 (^3为立方)7=2^3-128=3^3+163=4^3-1()=5^3+1=126215=6^3-1因此括号里应该填入126
C
B2=1^3+17=2^3-128=3^3+163=4^3-1126=5^3+1215=6^3-1
126
