→ yyc2008 : 都讀到Jackson了 應該看過原文書吧? 12/24 23:51
→ kerwinhui : 先乘除後加減… 12/25 12:59
The cube of the number is smaller than or equal to
eight times the square of the number minus 7
此題列為:x^3 <= 8(x-7)^2
x^3 <= 8x^2 - 7
x^3 <= 8(x^2-7)
請問何者正確?
The square of a number is bigger than
two times the number minus two
此題列為:x^2 >= 2(x-2)
x^2 >= 2x-2
請問何者正確?
感謝解惑
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 42.71.246.227
※ 文章網址: http://www.ptt.cc/bbs/Math/M.1419431037.A.075.html