It is given that when v remains unchanged, u varies inversely as the square of w; when w remains unchanged, u varies directly as the square root of v. When v=36 and w = 2,u=1
點解 條equation係 u =( k square root v )/w^2???
點解可以變左依條色出來????
variation!!!急!!
2010-12-15 5:08 am
回答 (1)
2010-12-15 10:20 pm
✔ 最佳答案
Combining two statements, u jointly varies as the square of w inversely and varies directly as the the square root of v.So we have, u = k√v / w^2 , where k is a non-zero constant.
Put u = 1, w = 2 and v = 36,
1 = k√36 / 2^2
4 = 6k
k = 2/3
Hence u = 2/3(√v) / w^2
參考: Knowledge is power.
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