標題:
A.Maths
發問:
1.Consider x^2+(2m+9)x+2m+k=0----------* where m and k are real constants.(a)if the difference of the roots of the equcation is 3,(i)express k in term of m.(ii)find the minimum value of k.(b)If k=39/4, slove (*)2.ABC is a right-angled triangle.AC is fixed and AB+AC=10cm.BDEF is a square with sides m cm od... 顯示更多 1.Consider x^2+(2m+9)x+2m+k=0----------* where m and k are real constants. (a)if the difference of the roots of the equcation is 3, (i)express k in term of m. (ii)find the minimum value of k. (b)If k=39/4, slove (*) 2.ABC is a right-angled triangle.AC is fixed and AB+AC=10cm.BDEF is a square with sides m cm od each where D,E,F are points on BC,AC and AB respectively.Let AB =x cm. (a)Express m in terms of x. (b)find x when the area of square BDEF attains its maximun.
As follows~~~ 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn01Jan061126.jpg?t=1199590031 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn02Jan061150.jpg?t=1199591425
其他解答:
A.Maths
發問:
1.Consider x^2+(2m+9)x+2m+k=0----------* where m and k are real constants.(a)if the difference of the roots of the equcation is 3,(i)express k in term of m.(ii)find the minimum value of k.(b)If k=39/4, slove (*)2.ABC is a right-angled triangle.AC is fixed and AB+AC=10cm.BDEF is a square with sides m cm od... 顯示更多 1.Consider x^2+(2m+9)x+2m+k=0----------* where m and k are real constants. (a)if the difference of the roots of the equcation is 3, (i)express k in term of m. (ii)find the minimum value of k. (b)If k=39/4, slove (*) 2.ABC is a right-angled triangle.AC is fixed and AB+AC=10cm.BDEF is a square with sides m cm od each where D,E,F are points on BC,AC and AB respectively.Let AB =x cm. (a)Express m in terms of x. (b)find x when the area of square BDEF attains its maximun.
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最佳解答:As follows~~~ 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn01Jan061126.jpg?t=1199590031 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn02Jan061150.jpg?t=1199591425
其他解答:
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