Question

下面计算正确的是( )A.x3÷x3=0B.x3-x2="x" C.x3·x2=...

下面计算正确的是( )A.x3÷x3=0B.x3-x2="x" C.x3·x2=x6D.x3÷x3=x

Answer 1

试题分析:A.
x3÷x3=x3-3=x0=1≠0,故本选项错误;
B.
x3-x2≠x,故本选项错误;
C.
x3·x2=x5≠x6,故本选项错误;
D.
x3÷x3=x,正确
故选D.
考点:
1.合并同类项;2.同底数幂的除法;3.
同底数幂的乘法.