Mathematics
Senior High
Solved
左辺から右辺にどうやって計算できるんですか？
前の式でa^2−a−1＝0ということが分かっています。
α"-a-1=0
このとき、
a°-2+2a=(α'lα-1)(α-1)+2α-1
=2α-1
1+/5
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