Mathematics
Senior High

4問ともわかりません
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6. 次の和を求めよ。 + {1+3+5 - (2n-1)} +27-1) 1 1 1 1 22+4 2+4+6 2+4+6+. +2n 1 1 1 1 *●●●●*+ト 1.2 1.2+2.3 1.2+2.3+3.4 1.2+2.3+

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