问题
填空题
a5-ax=a10,x=______,xa=2,xb=3,则x2a-b=______.
答案
∵a5•ax=a5+x=a10,∴5+x=10,解得:x=5;
∵xa=2,xb=3,∴x2a-b=(xa)2÷xb=4÷3=
.4 3
故答案为:5;4 3
a5-ax=a10,x=______,xa=2,xb=3,则x2a-b=______.
∵a5•ax=a5+x=a10,∴5+x=10,解得:x=5;
∵xa=2,xb=3,∴x2a-b=(xa)2÷xb=4÷3=
.4 3
故答案为:5;4 3