Mathematics
Senior High
Resolved
なんで18-3rになるのか、計算の仕方が分かりません！！教えてください(＞＜)
48
133(1)(x-1)の展開式の一般項は,
つまり
x-32
x
定数項になるのは, 18-3r=0 のとき,つまり
x²-42
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