问题
填空题
计算a3•a7=______,-x2•x3=______,22•42•82=______.
答案
a3•a7=a3+7=a10,
-x2•x3=-x5,
22•42•82=22•24•26=212.故答案分别为 a10,-x5,212.
计算a3•a7=______,-x2•x3=______,22•42•82=______.
a3•a7=a3+7=a10,
-x2•x3=-x5,
22•42•82=22•24•26=212.故答案分别为 a10,-x5,212.