a²-4a+1=0 两边同时除以a得
a-4+1/a=0
a+1/a=4
(a^8+1)/a^4
=a^4+1/a^4
=(a²+1/a²)²-2
=[(a+1/a)²-2]²-2
=(4²-2)²-2
=14²-2
=196-2
=194
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a²-4a+1=0 两边同时除以a得
a-4+1/a=0
a+1/a=4
(a^8+1)/a^4
=a^4+1/a^4
=(a²+1/a²)²-2
=[(a+1/a)²-2]²-2
=(4²-2)²-2
=14²-2
=196-2
=194
很高兴为您解答,【学习宝典】团队为您答题.
请点击下面的【选为满意回答】按钮,