问题
选择题
在下列运算中，计算正确的是（ ）
A．a3•a4=a12
B．a8÷a2=a4
C．（a3）2=a5
D．（ab3）2=a2b6
答案
A、a3•a4=a7，所以A选项不正确；
B、a8÷a2=a6，所以B选项不正确；
C、（a3）2=a6，所以C选项不正确；
D、（ab3）2=a2b6，所以D选项正确．
故选D．
搜题请搜索小程序“爱下问搜题”
在下列运算中，计算正确的是（ ）
A．a3•a4=a12
B．a8÷a2=a4
C．（a3）2=a5
D．（ab3）2=a2b6
A、a3•a4=a7，所以A选项不正确；
B、a8÷a2=a6，所以B选项不正确；
C、（a3）2=a6，所以C选项不正确；
D、（ab3）2=a2b6，所以D选项正确．
故选D．
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