【用戶】Anny Syue
【年級】高一上
【評論內容】令X=2.99,X^4-x^3=X^3(X-1)X^3=(3-0.01)^3= 27-0.18+0.0009+0.000001 ≒26.82X^3(X-1) =26.82*1.99 ≒26.82 *(2-0.01) =53.64-0.2682 =53.3718但說實在我是用估算法81-27 <54 猜53XDDD