- 問題詳情:如圖所示的某種容器的體積為90cm3,它是由圓錐和圓柱兩部分連接而成,圓柱與圓錐的底面半徑都為rcm.圓錐的高為h1cm,母線與底面所成的角為;圓柱的高為h2cm.已知圓柱底面的造價為2a元/cm2,圓柱側面造價為a元/cm2,圓錐側面造價為a元/cm2.(1)將圓柱的高h2表示為底面半徑r的函數,並...
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