✔ 最佳答案
https://lh6.googleusercontent.com/_cLbN44iq_wY/TdtSxE6uj-I/AAAAAAAAFx8/VpoQqawBhgM/3r2915.JPG
圖片參考:
https://lh6.googleusercontent.com/_cLbN44iq_wY/TdtSxE6uj-I/AAAAAAAAFx8/VpoQqawBhgM/3r2915.JPG
2011-05-24 17:06:42 補充:
答案是-2+2*根號7
是的~答案是-2+2*根號7
根號7=2.64575
2+2*根號7=2+2*2.64575=-2+5.2915=3.2915
是的~答案是-2+2*根號7= 3.2915
2011-05-24 17:07:09 補充:
2+2*根號7=-2+2*2.64575=-2+5.2915=3.2915
2011-05-24 17:07:45 補充:
答案是-2+2*根號7
是的~答案是-2+2*根號7
根號7=2.64575
2+2*根號7=-2+2*2.64575=-2+5.2915=3.2915
是的~答案是-2+2*根號7= 3.2915