標題:

find e,f,g,h

發問:

eg=45(1) eh=80(2) { fg=70(3) fh=56(4)

最佳解答:

eg = 45 ... (1) eh = 80 ... (2) fg = 70 ... (3) fh = 56 ... (4) (1)/(2) => g/h = 45/80 g = 9h/16 ... (5) (3)/(4) => g/h = 70/56 g = 5h/4 ... (6) Since e,f,g,h cannot be zero, (5) & (6) are inconsistent result => there is no solution

其他解答:

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此文章來自奇摩知識+如有不便請留言告知

(1)x(2)x(3)x(4): (efgh)^2=9x5x16x5x7x10x8x7 efgh=3x5x4x7x4 √5......(5) 但(1)x(4): efgh=2520.........................(6) (5)<>(6) 故無解!
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