:-81,-36,-9,0,9,36,( )。A.49B.64C.81D.100
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1,9,36,100,( )A.81B.27C.125D.225
3,1/2,9, 1/8,( ), 1512A.18B.29C.81D.36
100 3/4,______,64 16/12,49 64/36,36 256/108 ( )A.81 4/5B.81 5/9C.82D.81
5,6,7,9,17,()A.36 B.57 C.64 D.81
100 +3/4 ( ) 64+16/12 49+64/36 36+256/108 A. 81+4/5 B. 81+5/9 C. 82 D. 81
100*(3/4),( ),64*(16/12),49*(64/36),36*(256/108) A. 81*(4/5) B. 81*(9/5) C. 82 D. 81