已知xn=5,yn=3,求:(1)(x2y)2n;(2)x3n÷y4n.
问题描述:
已知xn=5,yn=3,求:(1)(x2y)2n;(2)x3n÷y4n.
答
(1)∵xn=5,yn=3,
∴(x2y)2n=x4ny2n=(xn)4(yn)2=54×32=5625;
(2)∵xn=5,yn=3,
∴x3n÷y4n=(xn)3÷(yn)4=53÷34=
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