Mathematics
Senior High
下線の式にする方法を教えて欲しいです。
2
= k(k+1x2k+1)+(2k+2)²
2
= (4k²+6k²+2k+12k² +24k+12)
(k+1xk+2x2k+3)
k-
= (k+1 x (k+1)+1| |2k+1)+1}
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