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我想要一個用黎計算一個interger既cube 既快formula
唔該explain 你點得出黎

2006-11-18 18:43:51 · 1 個解答 · 發問者 Jonathan 1 in 科學 數學

1 個解答

If you are using a computer, then
x^3=x*x*x

If you want to do it mentally, you can use the following formula:
(x+y)^3=x^3+3x^2y+3xy^2+y3

Try 34^^3=(30+4)^3;
x=30
y=4
30^3=27000
3*30^2*4=10800
3*30*4^2=1440
4^3=64
27000+10800+1440+64=39304

Otherwise use a calculator.

2006-11-19 00:19:28 · answer #1 · answered by p 6 · 0 0

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