If y varies directly as m and inversely as the square of n,a

烦恼也许存在2022-10-04 11:39:541条回答

If y varies directly as m and inversely as the square of n,and if y=8 when m=16 and n=1,then what is the value of y when m=8 and n=4?
A 0.125
B 0.25
C 0.5
D 1
E 2
求讲解
书后答案是D

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至爱项少龙 共回答了12个问题 | 采纳率100%
y跟m成正比,跟n^2成反比
所以y=k*m/(n^2) 已知y=8 when m=16 and n=1 所以k=0.5
那么当m=8,n=4时代入上式解出y=0.25
1年前

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