Mathematics
Senior High
青マーカーから緑マーカーの式の変形がわかりません。
明日テストなので詳しく解説していただけるとありがたいです💦
(3) r=
1-(-5)
(1-(-5)"}
1=√2₁²_₁= √²+1
よって S₁₁=
(√2 − 1){(√2+1) " − 1}
(√2+1)-1
(√2+1)*¹ — √√2 +1
√√2
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