Mathematics
Senior High
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⒍⒎の解説をお願いします🙇♀️
1)ターCo十saCrz十zaCze2十 …… 十saCzz2 を用いて, 次の等式を導け。
saCo一2Xaュ十22Xz。Cz一 SRたとの
ァ十27)『 の展開式における ァ9の5 の係数は
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