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
cube quick formula
2006-11-19 7:43 am
回答 (1)
2006-11-19 1:19 pm
✔ 最佳答案
If you are using a computer, thenx^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.
收錄日期: 2021-04-12 20:07:58
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