SOUHARU almost 8 yearsago 横は4+a 縦は4-a だから 側面=>4×(4+a)×2+4×(4-a)×2 底面=>(4+a)(4-a)×2 これを出せばok Post A Comment
![11番の[2]教えてください
右のページの所まではいきました、、。 - 1](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1809738/thumb_l_webp_E52F6F80-13F0-48BB-BCBC-D5D56B5B4D99.webp?Expires=1786765858&Signature=gpPnqu~wLIyZGkNr7wt1BABre9MOINwQU8hGKU-MzGQlX34eO9qZUWoSGaJbrJz3j--XWcWGYZBUjRg6ZBIyhNsVwkg0YI99ndTqrtM0RTNXumDMju5ehgIdVrto3LWvaGoRghL1rUOktBNd0AQOJGROQhMRTk3u4igdmxEdETpLp4hWzPcrmliUq9gVglDeipZHEM0pDjrT9aS69vMYuILqibVjQFAdzHSUDyDfil96nIz7BJp-soTnzrI24XKBWYFcz4DlfMfwwEOhqce5--jkr13ct9REb5aibepVUKeMT0LCYY6tD3cbTNrGxBC1wwTgGCf3yRh~jrwq5olm4A__&Key-Pair-Id=K2W722D70GJS8W&Expires=1786765858&Signature=Wkb35FwvzE2cBCuxuOtTx5Xs-czbAbHDgQPKmkipMWcidXiYIqn7I6VE~T3enLP7XBpiSAg9EZlVf~DRongLt-kQK7sCWSihUcLkGqFrAQuOO7fuBDez0Lzu5obxpI~qh6MyIQiRj1JgNxxycLAx85MKzawJxTpKLnsS5xOVhcXpegMHzcO~8bxneI~4vZPjeAPA7nRhb5vMAvE2~-BfjTsiiQhNZuB7eihACacZ7VEWAYYLNx4zu2HHIGWDf1zHtiDi2~FUHE2TttuFvVCxeM4YbWIL1O1qrr0afShlBQz6c9tBiqHJzOJ4hAvluTkBxwd3MViOtygHlFBtV521EQ__&Key-Pair-Id=K2W722D70GJS8W)
