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| 2017/07/04 14:25:36瀏覽42｜回應0｜推薦0 | |
| 標題: Maths question 發問: 1.Given that w partly varies directly as s and partly varies directly as s^3,and w=56 when s=6,w=436 when s=12,find (a) an equation connecting s and w, (b) the vaiue of w when s=2. 最佳解答:
此文章來自奇摩知識+如有不便請留言告知 a)w=cs+ks^3 56=6c+216k---1 436=12c+1728k---2 so ...k=1/4,,,c=1/3 W=1/3s+1/4s^3 b)w=2/3+2 =8/3其他解答: |
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