maths variation
2007-07-08 1:43 am
It is given that y varies inversely as x^3 , if x increased 100% , then y is?
回答 (2)
2007-07-08 3:06 am
✔ 最佳答案
y = k / x^3 , k ≠ 0 y1 = k / {x ( 1 + 100% )}^3
= k / 8x^3
The % change = { ( y1 - y ) / y }( 100 % )
= { ( k / 8x^3 - k / x^3 ) / ( k / x^3 ) } ( 100% )
= - 87.5 %
參考: My Maths Knowledge
2007-07-08 1:48 am
x^6
(x^3)(x^3)=x^6
(x^3)(x^3)=x^6
收錄日期: 2021-04-12 21:46:50
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