Mathematics
Senior High
数学II p56 training34の問題がわからないので教えて頂きたいです
34. atがこ2(atb-1)
く証明>
(左)-(左皿)
= ^'+Q-21aム一)
at a-20-2h+2
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参考になりました！ほんとにありがとうございます🙇♀️