14.下列运算正确的是( )
| A. | a3+a3=a6 | B. | a2•a2=a4 | C. | (2a)4=2a4 | D. | a6÷a3=a2 |
10.下列运算正确的是( )
0 282938 282946 282952 282956 282962 282964 282968 282974 282976 282982 282988 282992 282994 282998 283004 283006 283012 283016 283018 283022 283024 283028 283030 283032 283033 283034 283036 283037 283038 283040 283042 283046 283048 283052 283054 283058 283064 283066 283072 283076 283078 283082 283088 283094 283096 283102 283106 283108 283114 283118 283124 283132 366461
| A. | x2•x3=x6 | B. | (x2)3=x6 | C. | x2+x3=x5 | D. | x2+x2=2x4 |