Mathematics
Senior High
どうやって計算しているのか教えてください。
bak+1 = 2a2k - bak-1 = 2(-1)k - b2k-1
:(-1)k+!b2k+1 -(11)^b2k-1 = 2(-1)
.(-1)*b2k-1 = (-1)b」 + (k-1).2(-1) = -2k +1
: b2k-1 = (-1)k-1 (2k - 1)
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