已知以am=2,an=4,ak=32. (1)am+n=_; (2)求a3m+2n-k的值.
问题描述:
已知以am=2,an=4,ak=32.
(1)am+n=______;
(2)求a3m+2n-k的值.
答
(1)∵am=2,an=4,
∴am+n=am•an=2×4=8,
故应填8;
(2)∵am=2,an=4,ak=32,
∴a3m+2n-k=a3m•a2n÷ak,
=23×42÷32,
=8×16÷32,
=4;
即a3m+2n-k的值为4.